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NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual

5 Operation and Maintenance

Issue 01 (2017-07-27)

Huawei Proprietary and Confidential

186

5.4.9 Replacing the Humidifier Pump

Prerequisites



The humidifier pump needs to be replaced.



A spare humidifier pump of the same model is available and functional.



Tools: Phillips screwdriver, flat-head screwdriver.

Context

The humidifier pump can be maintained only from the rear door.

Procedure

Step 1

On the controller home screen, tap

Shutdown

, and turn off the air conditioner switch in the

PDC.

Exercise caution because the device is still energized after it is shut down on the controller
home screen.

Step 2

Open the rear door and remove the air filter.

Step 3

Cut the cable ties securing the humidifier pump cable and remove the terminals.

Step 4

Remove the screws that secure the humidifier pump fastener using a Phillips screwdriver, as
shown in

Figure 5-36

, and pull out the humidifier pump and the fastener.

Step 5

Remove the hose clamps at the water inlet and outlet ports of the humidifier pump and on the
humidifier pump using a flat-head screwdriver, and remove the water inlet and outlet pipes, as
shown in

Figure 5-36

Summary of Contents for NetCol5000-A

Page 1: ...NetCol5000 A 42 kW Air Cooled In row Precision Air Conditioner User Manual Issue 01 Date 2017 07 27 HUAWEI TECHNOLOGIES CO LTD ...

Page 2: ... Huawei and the customer All or part of the products services and features described in this document may not be within the purchase scope or the usage scope Unless otherwise specified in the contract all statements information and recommendations in this document are provided AS IS without warranties guarantees or representations of any kind either express or implied The information in this docum...

Page 3: ...res provided in this document are for reference only Intended Audience This document is intended for Sales personnel Technical support personnel System engineers Hardware installation personnel Commissioning engineers Data configuration engineers Maintenance personnel Symbol Conventions The symbols that may be found in this document are defined as follows Symbol Description Indicates an imminently...

Page 4: ...age data loss performance deterioration or unanticipated results NOTICE is used to address practices not related to personal injury Calls attention to important information best practices and tips NOTE is used to address information not related to personal injury equipment damage and environment deterioration Change History Changes between document issues are cumulative The latest document issue c...

Page 5: ...ing Components 10 2 2 3 Controller 13 2 3 Physical Ports 16 2 4 Product Specifications 17 3 Installation Guide 20 3 1 Installation Precautions 20 3 2 Installation Preparation 22 3 2 1 Tools 22 3 2 2 Material Preparations 26 3 2 2 1 Optional Refrigerant R410A 26 3 2 2 2 Optional Pipe Assembly 27 3 2 2 3 Optional Humidifier Water Inlet Pipe 29 3 2 2 4 Drainpipe 29 3 2 2 5 Pipe Support 31 3 2 2 6 Cab...

Page 6: ...0 3 11 2 3 Optional Installing the Differential Pressure Sensor 71 3 11 3 Teamwork Networking and Monitoring 73 3 11 3 1 Main Control Module 73 3 11 3 2 Connecting the Teamwork Network Cable 73 3 11 3 3 Connecting the Monitoring Network Cable 75 3 11 4 Connecting the T H Sensor Outside the Cabinet 77 3 12 Connections Verification 80 4 Commissioning 82 4 1 Vacuumizing and Precharging Refrigerant 82...

Page 7: ...g the Compressor 165 5 4 5 Replacing the Filter Dryer 172 5 4 6 Replacing the Driver 175 5 4 7 Replacing the Liquid Level Detector 178 5 4 8 Replacing the Condensate Pump 182 5 4 9 Replacing the Humidifier Pump 186 5 4 10 Replacing the Wet Film Humidifier 189 5 4 11 Replacing the Electric Heater 192 5 4 12 Replacing a Strong current Box 196 5 4 13 Replacing Main Control Module Auxiliary Power Supp...

Page 8: ... Date or Time 232 6 16 How to Modify a Password 233 6 17 Restoring Factory Settings 234 6 18 How to Silence the Buzzer 236 6 19 How to Enable a Humidity and Temperature Sensor 236 6 20 How to View Teamwork Control Information 237 6 21 Which Parameters Are Restored to Default Values After Default Settings Are Operated 237 6 22 How to Change the SSH Access Password 238 6 23 How to Import a Certifica...

Page 9: ... attention to the safety symbols on the equipment and all the safety instructions in this document The NOTICE CAUTION WARNING and DANGER statements in this document do not represent all safety instructions They are only supplements to the safety instructions Pay attention to the safety symbols on the equipment and all safety instructions in this document The safety precautions given in this docume...

Page 10: ...rmanently to the protection ground Personal Safety Do not perform operations on the equipment or cables during thunderstorms Keep unauthorized personnel away from the equipment When operating the equipment wear insulation shoes and gloves and take measures to protect your eyes Remove conductive objects such as jewelry and watches to avoid electric shocks or burns Ensure that tools are insulated Eq...

Page 11: ...evice with PVC insulation tape and place them in appropriate positions Power Cable Do not install or remove power cables when the equipment is powered on Transient contact between the core wire of a power cable and a conductor may generate electric arcs or sparks which may start a fire or cause eye injury Turn off the power switch before installing or removing a power cable Verify that the label o...

Page 12: ...ns may be damaged When replacing a component near fans do not insert your fingers or boards into the fans unless the fans are switched off and stop running Transportation and Moving Wear protective gloves when moving devices Be careful when moving heavy objects Use caution when removing a heavy or unstable device from a cabinet Choose railways sea or roads with good condition for transportation En...

Page 13: ...cloth and water container are available Do not place a flaming welding torch on equipment or the ground To avoid burning caused by gas leaks do not put an acetylene and oxygen welding torch inside a metal container Cool down hot pipes immediately after welding them Do not weld or cut on pressurized containers or pipes Disconnect the equipment from power sources before welding or cutting 1 4 Operat...

Page 14: ...e routed with a distance of at least 30 mm between the cables and the DC busbar shunt and fuse This prevents damage to and decelerates deterioration of the insulation layer of the cables Cables must be flame retardant and must not be routed behind the air inlets or outlets of the cabinet The air inlets and outlets must not be blocked Storage Ensure that the equipment is not located near heat sourc...

Page 15: ...r Manual 1 Safety Precautions Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 7 Manual Loss If you lose this manual contact Huawei technical support to obtain the electronic document or download it from http www huawei com ...

Page 16: ...recision Air Conditioner User Manual 2 Product Description Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 8 2 Product Description 2 1 Model Description Figure 2 1 NetCol5000 A model description ...

Page 17: ...t 2 Controller panel 3 Door lock 4 Front door 5 Mounting hole 6 Side panel 7 Rear door 8 Anchor D in the figure stands for the cabinet depth which can be 1100 mm or 1200 mm Table 2 1 shows the available cabinet dimensions Table 2 1 Dimensions Dimensions H x W x D mm Expansion Method Standard dimensions 2000 x 600 x 1100 Expanded dimensions 2000 x 600 x 1200 Install an enclosure frame 2200 x 600 x ...

Page 18: ... mm at the bottom 4 Refrigerant gas pipe hole Φ43 mm on the top 11 Signal cable hole Φ28 mm at the bottom 5 Power cable hole Φ28 mm on the top 12 Power cable hole Φ28 mm at the bottom 6 Humidifier water inlet hole Φ43 mm on the top 13 Humidifier water inlet hole Φ43 mm at the bottom 7 Signal cable hole Φ28 mm on the skylight 2 2 2 Cooling Components The NetCol5000 A mainly consists of a DC variabl...

Page 19: ...essor driver 13 Weak current box 14 T H sensor 15 Discharge pipe 16 EEV 17 Oil separator 18 Sight glass 19 Compressor 20 Filter dryer Compressor The NetCol5000 A uses a DC variable frequency compressor that features compact size light weight long service life low noise easy installation as well as high reliability stability and energy efficiency The high precision drive automatically adapts to the...

Page 20: ...n of the step motor thereby changing the pass through area of the valve to regulate the flow of refrigerant The EEV is equipped with an energy storage unit that prevents slugging due to migration of refrigerant when the air conditioner is powered off abnormally Oil separator It is an oil gas separator which separates the lubricant brought out due to exhaustion of the compressor and brings back the...

Page 21: ...switch triggers an alarm prompting for air filter replacement T H sensor Six built in negative temperature coefficient NTC temperature sensors and one return air T H sensor are provided 2 2 3 Controller Appearance The 7 inch display panel with the true color touchscreen provides user interfaces for query setting monitoring and maintenance The indicator on the panel displays operating status of the...

Page 22: ...alarm generation Yellow Beeping intermittently The buzzer keeps buzzing if a critical alarm is not confirmed after the alarm generation Red Beeping continuously Ports Figure 2 6 Ports on the controller sides 1 Fast Ethernet FE port 2 Communications port for the main control board and LCD 3 USB port 4 Dual in line package DIP switch on LCDa a The first toggle switch DIP status is ON and the second ...

Page 23: ...ting or humidification and dehumidification in order to save energy You can monitor manage and upgrade one or more air conditioners using the remote management software provided by Huawei At least 500 historical alarms can be stored Access logs can be traced back At least 200 historical login and setting records can be stored The controller can display 30 days temperature and humidity in colored c...

Page 24: ...cal isolation O M personnel can export fault records in one click mode making it easy to operate the air conditioner and know the running status of the air conditioner The air conditioner supports communications protocols such as Modbus RTU Modbus TCP and SNMP facilitating connection to the network management system The controller intelligently identifies abnormal parameter settings incorrect comm...

Page 25: ...ipe Outer diameter of 7 8 inch 22 22 mm welding For the requirement of engineering pipes see 3 2 2 2 Optional Pipe Assembly 2 4 Product Specifications Table 2 5 Table 2 6 and Table 2 7 describe the technical specifications of the NetCol5000 A in row precision air conditioner Table 2 5 General specifications Item Specifications Refrigerant R410A Cooling capacitya 42 kW Air supply mode Horizontal fl...

Page 26: ...al power supplies Single power supply Dual power supplies Max Current 40 A Active 40 A Standby 40 A 46 A Active 46 A Standby 40 A Condensa te pump Yes Yes Yes Yes Heating function No No Yes Yes Humidifi cation function No No Yes Yes Reheating capacity N A N A 6 kW 6 kW Humidify ing capacity N A N A 3 kg h 3 kg h Table 2 7 Application conditions Operating temperature Specifications Operating temper...

Page 27: ...ESD floor mounted Pipe and cable routing Pipes and cables routed from the top or bottom Altitude 0 4000 m When the altitude exceeds 1000 m the power should be derated For detailed derating data see Table 2 8 Table 2 8 Derating coefficients Altitude m 0 1000 1500 2000 2500 3000 3500 4000 Air volume coefficient 1 0 887 0 835 0 785 0 737 0 692 0 649 0 608 Cooling capacity coefficient 1 0 940 0 909 0 ...

Page 28: ... is not a product quality issue and should be dealt with by adding a dehumidifier Table 3 1 Installation requirements Item Specifications Equipment room door Width 1 2 m height 2 3 m Floor Floor bearing capacity 530 kg m2 Equivalent length of one way pipe 100 m Vertical difference between the indoor and outdoor units Outdoor unit higher than indoor unit 30 m Outdoor unit lower than indoor unit 8 m...

Page 29: ... breaker is required by the customer or by local regulations use the residual current circuit breaker RCCB that is not sensitive to the single phase DC pulses and transient current pulses Note If the requirements are not met contact Huawei technical support for an optimized solution Space Requirements Before installation verify that the installation environment meets the requirements and whether r...

Page 30: ...that cause local resistance loss for example elbows and convert them into the equivalent length to straight pipes as shown in Table 3 10 The total length of pipes connecting the indoor unit and outdoor unit L equals to the equivalent straight length of elbows and connectors plus the length of the straight pipes connecting the indoor unit and outdoor unit Concrete floor does not support underfloor ...

Page 31: ...ips screwdriver M4 M6 and M8 Flat head screwdriver M3 and M4 Socket wrench 18 mm Torque wrench 28 mm Solid wrench 18 mm and 13 mm Box end wrench Diagonal pliers Combination pliers Needle nose pliers Sealant or seal tape for thermal insulation foam a Right angle Step ladder 2 m Torch Measuring tape Hammer drill Marker Protective glove Electric screwdriver N A N A a The sealant or seal tape for ther...

Page 32: ...pearance specifications and name Cutter Sealant or seal tape for screw threads a Welding torch Copper phosphorus brazing rod containing 5 silver Oxygen Acetylene Subterrene Nitrogen a The specifications of the sealant or seal tape for screw threads are as follows Sealant or seal tape applies to all pipe material Anaerobic metal pipe thread sealant with polytetrafluorethylene PTFE for short as the ...

Page 33: ...Clamp meter Electronic scale Antifreeze gloves Reducing valved a The pressure gauge and leather hose should be used especially for R410A the measurement range of the pressure gauge must be greater than or equal to 4 0 MPa and the tolerance range of the leather hose must be greater than or equal to 4 5 MPa The size of needle valve in the unit is 1 4 inch Purchase a conversion adapter if you have a ...

Page 34: ...h quality brands such as DuPont Daikin or Honeywell 2 Contact the refrigerant producer to confirm the refrigerant authenticity 3 Check the refrigerant by following the steps shown in Figure 3 2 Keep the refrigerant indoors at a constant temperature and humidity for 24 hours Use a thermometer to measure the external surface temperature of the refrigerant container and connect a pressure gauge to th...

Page 35: ... 2 57 7 0 9 26 1 60 45 2 63 8 0 93 27 1 65 46 2 7 9 0 96 28 1 69 47 2 76 10 0 99 29 1 74 48 2 83 11 1 02 30 1 79 49 2 9 12 1 05 31 1 84 50 2 97 13 1 09 32 1 89 51 3 04 14 1 12 33 1 94 52 3 11 15 1 16 34 1 99 53 3 19 16 1 19 35 2 04 54 3 26 17 1 23 36 2 1 55 3 34 18 1 27 37 2 15 N A N A 3 2 2 2 Optional Pipe Assembly Liquid pipe L 60 m R410A copper pipe outer diameter of 5 8 inch 15 88 mm wall thic...

Page 36: ... inverted traps unit mm Table 3 8 Specifications for oil traps and inverted traps No Name Outer Diameter and Thickness mm Technical Requirements 1 Oil trap 22 2 x 1 2 The flaring inner diameter of the copper pipe is 22 4 mm and the necking outer diameter is 19 5 mm 2 Inverted trap of gas pipes 22 2 x 1 2 The flaring inner diameters at both ends of the copper pipe are 22 6 mm 3 Inverted trap of liq...

Page 37: ...1 2 inch delivered with the water inlet pipe for the air conditioner 2 Rigid pipe conversion adapter G 1 2 inch connected to a rigid pipe with outer screw threads 3 Rigid pipe made of PP R or other materials 4 Pagoda connector G 1 2 inch connected to a pagoda connector with outer screw threads 5 Hose clamp 6 Hose made of EPDM or other materials The object shown in the dotted line box is the water ...

Page 38: ...1 2 inch connected to a rigid pipe with external threads 3 Rigid pipe made of PP R C PVC or other materials 4 Pagoda connector For details see Figure 3 6 5 Hose clamp 6 Hose inner diameter of 3 4 inch made of EPDM or other materials The object shown in the dotted line box is the drainpipe connector with inner screw threads delivered with air conditioners The hose clamp as shown by 5 in the precedi...

Page 39: ...is recommended that pipe supports and pipe clamps be made of 304 stainless steel Install a support every 1500 mm for the straight sections of pipes and 500 mm away from each bending point in turning sections 3 2 2 6 Cable The site ground resistance must be less than 0 1 ohm The cable flame spread rating must be at least VB Table 3 9 lists the cables and devices to be connected onsite When connecti...

Page 40: ...ked crimping terminal single wire cord end terminal 2 5 mm2 12 5 A tin plating insertion depth 8 mm blue Delivered with the fittings Indoor and outdoor units Signal cable to the indoor and outdoor units optional Electrical power cable 300 V SJTW 3 x 16 AWG black three cores black white and green 10 A shielded outdoor cable UL The cable applies to the RS485 communication connection The length is de...

Page 41: ... the fittings 3 2 3 Installation Layout Principles Layout principles for installing the NetCol5000 A are as follows If the outdoor unit is placed higher than the indoor unit the vertical distance between them should be less than or equal to 30 m An oil trap should be installed every 5 m to 6 m in the vertical direction along the gas pipe to ensure system reliability 3 2 2 2 Optional Pipe Assembly ...

Page 42: ...f the condenser In the figure is a sign of a tilt indicating that the scale of the pipe tilting is at least 1 200 The pipe tilting direction should be consistent with the hypotenuse of the right triangle If the indoor unit is placed higher than or equal to the outdoor unit inverted traps or oil traps are not needed When pipes are routed through the wall or floor of the main equipment room protecti...

Page 43: ...Ltd 35 Figure 3 9 Top pipe routing scenario 1 Inverted trap 2 Oil trap 3 Tilted gas pipe 4 Tilted liquid pipe 3 3 Unpacking Procedure Step 1 Inspect the outer packing for signs of damage If any damage is found contact the shipping company immediately Step 2 Unpack the product 1 Remove the straps top cover outer packing cushioning materials and then plastic film as shown in Figure 3 10 ...

Page 44: ...ratches If any damage is found contact the shipping company immediately Step 3 Check the type and quantity of fittings against the packing list If fittings are missing or inconsistent with those in the packing list record the information and contact your local Huawei office immediately End 3 4 Checking the Nitrogen Pressure Procedure Step 1 Open the door lock using a key and open the cabinet rear ...

Page 45: ...rews that secure the baffle plates using a Phillips screwdriver until they can be rotated open manually Step 3 Take out the desiccant bag Step 4 Check whether any of the needle valve bonnets shown in Figure 3 12 is missing by turns 1 If they do not exist contact Huawei technical support 2 If they exist remove each valve bonnet and use it to press the valve plugs in turn If nitrogen is exhausted th...

Page 46: ...of the needle valves 1 Low pressure needle valve 2 Discharge pipe needle valve 3 Liquid pipe needle valve End 3 5 Removing the Transport Fixing Sheet Metals 3 5 1 Removing the Pallet Procedure Step 1 Use a 10 socket wrench to remove the eight M6x16 screws securing the fasteners to the cabinet and use an 18 socket wrench to remove the four M12x35 screws securing the fasteners to the pallet as shown...

Page 47: ...7 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 39 Figure 3 13 Removing the screws Step 2 Remove the cabinet from the pallet End 3 5 2 Removing the Transport Fasteners from the Compressor Procedure Step 1 Loosen the three bolts on the compressor transport fasteners using a 13 solid wrench ...

Page 48: ... the transport fasteners from the compressor Do not remove the bolts directly Put away the removed transport fasteners so that you can reinstall them if the indoor unit is to be transported again in the container scenario Step 2 Remove the transport fasteners Step 3 Tighten the bolts on the compressor again to a torque of 12 N m End 3 6 Install Process Figure 3 15 shows the process for installing ...

Page 49: ...7 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 41 Figure 3 15 Process for installing an indoor unit 3 7 Installing Indoor Units 3 7 1 Installing the Air Conditioner Cabinet with Base Procedure Step 1 Optional Make the base If the base is not need to make onsite skip this step ...

Page 50: ... 5 mm is recommended When the width of angle steel is more than 50 mm it is interfering with the cable routing holes Cut out the part on the angle steel to avoid interfering If the width is less than or equal to 50 mm skip this step Control the welding process and avoid excessive error The M12 bolt used for securing the cabinet to its base must be at least 80 mm long The base bearing capacity must...

Page 51: ... from which mice may enter into equipment and damage the equipment Figure 3 17 Positions of holes at the cabinet bottom unit mm Step 3 Place a cabinet onto the base and adjust the cabinet position to ensure that the mounting holes in the cabinet and base are aligned with each other Step 4 Level the cabinet using an adjustable wrench as shown in Figure 3 18 Before leveling the cabinet use a measuri...

Page 52: ...dard Ensure that the cabinet is level in width and depth directions when leveling the cabinet Put a level at the bottom of the cabinet in width and depth directions and check that the air bubble is in the middle between the two lines marked on the glass tube as shown in Figure 3 18 Figure 3 18 Leveling a cabinet 1 Level Step 5 Optional Combine the cabinets as shown in Figure 3 19 1 Remove the M5 t...

Page 53: ...on Air Conditioner User Manual 3 Installation Guide Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 45 Figure 3 19 Combining cabinets Step 6 Secure the cabinets using the M12 bolts in the fittings bag ...

Page 54: ...7 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 46 Figure 3 20 Securing a cabinet End 3 7 2 Installing the Air Conditioner Cabinet Without Base Procedure Step 1 Determine the position for installing the cabinet Mark mounting holes based on the drawings as shown in Figure 3 21 ...

Page 55: ... Co Ltd 47 Figure 3 21 Distances between mounting holes unit mm Step 2 Drill a hole in each mounting hole position using a hammer drill Step 3 Move the cabinet over its castors to the installation position Step 4 Level and combine the cabinets by referring to Figure 3 18 and Figure 3 19 Step 5 Secure the air conditioner cabinet to the ground using the M12 bolts in the fittings bag ...

Page 56: ... Open the front door Remove the power cable of the display screen FE cable and the ground cable for the front door Then pull the front door upwards and remove it Step 2 Remove one bolt fixing plate two connection plates and two hinges Step 3 Move the enclosure frame to the front door and adjust the anchor bolts of the enclosure frame to ensure that the enclosure frame has the same height with the ...

Page 57: ... 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 49 Figure 3 23 Installing an enclosure frame The positions of the bolt fixing plate hinges and connecting plates vary depending on the cabinet model Step 5 Secure one top sealing plate to the enclosure frame using four M5 tapping screws ...

Page 58: ...doors do not mix up the doors of different air conditioners Ensure that the bar code in the lower left corner on the back of the LCD is consistent with the bar code on the frame Step 8 Install the power cable for the display screen and the FE cable Connect the ground cable under the front door to the enclosure frame according to the label on the enclosure frame Step 9 Cut the cable ties securing t...

Page 59: ...uge leather hose to the needle valve Figure 3 25 Exhausting nitrogen 1 Low pressure needle valve 2 Exhaust pipe needle valve 3 Liquid pipe needle valve Step 2 Open the pressure gauge valve Loud noises of air flow are generated at first and then disappear gradually Step 3 After the air is exhausted remove the pressure gauge and install the valve bonnet Step 4 Continue exhausting nitrogen from the e...

Page 60: ... mm from the welding position by removing the valve plug or wrapping the valve with a piece of wet cloth Take protective measures such as spreading a piece of wet cloth around the welding position to avoid burning the bottom panel top panel side panel internal components needle valves other pipes thermal insulation foam power cables labels and tags During the welding avoid exposing the refrigerant...

Page 61: ...d performance of the cooling system For details see Table 3 11 5 Pipe length mentioned in this document is equivalent Table 3 10 Equivalent length of components Copper Pipe Outer Diameter in 45 Bend Unit m 90 Bend Unit m 180 Bend Unit m T shaped Three Way Valve 3 8 0 12 0 2 0 4 0 6 1 2 0 14 0 25 0 5 0 65 5 8 0 17 0 3 0 6 0 7 3 4 0 2 0 35 0 7 0 8 7 8 0 24 0 42 0 8 1 2 1 0 28 0 5 1 1 3 1 1 8 0 32 0 ...

Page 62: ...yright Huawei Technologies Co Ltd 54 Figure 3 26 Routing the refrigerant pipe Onsite personnel are responsible for preparing the required materials and installing the supports Bottom Pipe Routing Step 1 Remove the plugs from the bottom refrigerant pipe using a welding torque as shown in Figure 3 27 Figure 3 27 Bottom pipe routing 1 Gas pipe 2 Liquid pipe ...

Page 63: ... When welding a liquid pipe gently inject nitrogen into the pipe through the liquid pipe needle valve Figure 3 28 Welding pipes Step 2 Cut a cross in the rubber ring using a utility knife and route the pipe wrapped with the thermal insulation tube through the hole Ensure that the rubber ring is not disconnected If the rubber ring is disconnected or damaged seal the gaps around the pipes with masti...

Page 64: ...ting 1 Gas pipe 2 Liquid pipe Step 2 Connect the gas and liquid pipes to the gas and liquid pipes of the outdoor unit respectively End 3 9 2 Connecting the Humidifier Water Inlet Pipe Context The humidifier water inlet pipe can be connected using a hose or a rigid pipe Figure 3 4 shows how to connect the pipe Figure 3 30 Connecting a water inlet pipe 1 Connector with inner screw 2 Rigid pipe conve...

Page 65: ... water inlet pipe connector with inner screw threads delivered with air conditioners The hose clamp as shown by 5 in the preceding figure is provided in standard configuration Other parts are not provided and need to be purchased Bottom Pipe Routing Step 1 Straighten the water inlet pipe delivered with the air conditioner and route it from the inside to the outside through the water inlet hole at ...

Page 66: ...the water inlet pipe delivered with the air conditioner and route it from the inside to the outside through the water inlet hole on the top of the air conditioner Figure 3 32 Upward routing of the water inlet pipe The other end is a reserved G 1 2 inch connector with inner screw threads Connect the other end to a hose or rigid pipe based on site requirements Secure the water inlet pipe inside the ...

Page 67: ...th inner screw threads BSPP 1 2 inch delivered with air conditioners 2 Conversion adapter BSPT 1 2 inch connected to a rigid pipe with external threads 3 Rigid pipe made of PP R C PVC or other materials 4 Pagoda connector For details see Figure 3 6 5 Hose clamp 6 Hose inner diameter of 3 4 inch made of EPDM or other materials The object shown in the dotted line box is the drainpipe connector with ...

Page 68: ... wrapped with the thermal insulation tube through the hole Ensure that the rubber ring is not disconnected If the rubber ring is disconnected or damaged seal the gaps around the pipes with mastic cement or thermal insulation foam Step 4 Connect the PPR water pipe using a hot melt gun as shown by 3 in Figure 3 34 Step 5 Connect the drainpipe to the external drainage system End Top Pipe Routing When...

Page 69: ...ure gauge must be greater than or equal to 4 0 MPa and the tolerance range of the leather hose must be greater than or equal to 4 5 MPa Only nitrogen is allowed when leak checking Do not remove the pressure gauge and the leather hose when charging nitrogen to retain the pressure to prevent the nitrogen from leaking Procedure Step 1 Connect a leather hose pressure gauge reducing valve and nitrogen ...

Page 70: ...trogen to pipes without configuring low temperature component 1 Nitrogen cylinder 2 Reducing valve 3 Low pressure gauge 4 High pressure gauge 5 Low pressure needle valve 6 Exhaust pipe needle valve If a low temperature component is installed on the outdoor side connect pipes as shown in Figure 3 37 and charge nitrogen into the system from the low pressure discharge pipe and liquid pipe needle valv...

Page 71: ... preserve the pressure at 3 0 MPa for 24 hours The system pressure should not decrease before and after pressure preservation provided that the ambient temperature is stable If the pressure varies due to ambient temperature changes conduct the pressure preservation test again The outlet pressure must be no more than 3 0 MPa If the outlet pressure is more than 3 0 MPa some parts of the system may b...

Page 72: ...3 2 2 6 Cable Check that the input power cable of the indoor unit has no reverse phase sequence or open phase Keep cables out of touch with the compressor fan and copper pipes if unavoidable take protective measures and connect cables properly The device must be grounded as required by local electrical regulations Cables must be routed in through cable clips Connecting the Power Cable to an Indoor...

Page 73: ...tep 2 Connect the PE cable to the cabinet ground bar as shown in Figure 3 38 End Connecting the Power Cable to an Indoor Unit Dual Power Supplies Step 1 Route the external power cable through the cabinet cable hole to the L1 L2 L3 and N ports of the AC1 and AC2 terminals on the indoor unit respectively When there are two power supplies the power cables must be connected to the primary route AC1 fi...

Page 74: ...right Huawei Technologies Co Ltd 66 Figure 3 39 Routing cables for the dual power supplies Step 2 Connect the PE cable to the cabinet ground bar as shown in Figure 3 39 End Connecting the Power Cable to an Outdoor Unit Step 1 Route the outdoor unit power cable through the cabinet cable hole to the L1 L2 L3 and N ports of the AC3 terminal on the indoor unit ...

Page 75: ... The figure shows how to connect the outdoor unit power cable AC3 in the single power supply scenario The cable connection method is the same when there are two power supplies Step 2 Connect the PE cable to the PE bar on the right of the AC3 terminal as shown in Figure 3 40 End 3 11 2 Connecting Signal Cables Customers can purchase the signal cables from Huawei or prepare their own cables Before c...

Page 76: ...t to Communicate the Outdoor fan communication failure alarm will be displayed on the LCD If the signal cable connects to an RS485 port while Outdoor fan control mode is set to Dry contact the Comp discharge HP alarm will be displayed on the LCD after the compressor starts If the Outdoor fan control mode is changed on the screen the screen will restart Procedure Step 1 Route the cable through the ...

Page 77: ... 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 69 Figure 3 41 Connecting the outdoor unit on off signal cable RS485 connection Dry contact connection Connect one end of the cable to points 1 and 2 on the external signal port X301 and the other end to ports 1 and 2 on the outdoor unit ...

Page 78: ...Context A water sensor monitors resistance changes at terminals to determine whether the floor is watery When the terminals of a water sensor detect water or other conductive liquid resistance between the two terminals decreases Keep water sensors far away from water traps or floor drains Procedure Step 1 Connect one end of the water sensor cable to the water sensor Step 2 Connect the other end of...

Page 79: ...wards on the ground Figure 3 43 Connecting a cable to the water sensor End 3 11 2 3 Optional Installing the Differential Pressure Sensor Context The differential pressure sensors are optional components and installed with sheet metal fasteners before delivery Secure the fasteners install the pressure inlet tube and connect cables onsite Procedure Step 1 Secure the differential pressure sensor and ...

Page 80: ...ure sensor and route it to the cold aisle through the hole on the top of the cabinet Connect another pressure inlet tube to the mark on the micro differential pressure sensor and route it to the hot aisle through the hole on the top of the cabinet as shown in step 2 in Figure 3 44 Step 3 Connect the three terminals of 12 V DC GND and 0 5 V feedback of differential pressure sensor cable to ports 1 ...

Page 81: ...toring port 2 CAN_IN input port of the teamwork CAN northbound RS485 port 3 RS485 12 V T H module port 4 Main control board handle 5 SW reserved 6 DIP switch 7 COM northbound RS485 port 8 CAN_OUT output port of the teamwork CAN northbound RS485 port 9 FE_2 FE teamwork port 10 Alarm indicator 11 Run indicator 12 Power indicator 3 11 3 2 Connecting the Teamwork Network Cable Air conditioners in a te...

Page 82: ...her end to the POE port on the smart ETH gate as shown in Figure 3 48 Figure 3 48 Connecting the FE teamwork network cable End Connecting the CAN teamwork network cable In CAN networking a maximum of 32 air conditioners can be teamworked If CAN networking is required onsite set Teamwork CAN resistor enable on Teamwork Settings of the first and last air conditioners to Yes Step 1 Connect the CAN_OU...

Page 83: ...NMP Modbus TCP When the FE teamwork networking is used inside the air conditioners connect the external monitoring network cable to the FE port on the air conditioner To use the FE monitoring the communications protocol should be SNMP or Modbus TCP Step 1 Connect one end of the monitoring network cable standard network cable prepared by the customer onsite to the FE_1 port on the main control modu...

Page 84: ...if required onsite Step 2 Group air conditioners for monitoring based on performance requirements and connect the monitoring network cables as shown in Figure 3 51 Monitoring grouping of air conditioners can be achieved through the toggle switches on the main control module For details see Table 3 12 The following figure shows the connection diagram when 32 air conditioners grouped by four are con...

Page 85: ...of cold hot aisles They can be flexibly installed on the server cabinet based on onsite situation It is recommended that the T H sensors be deployed near heat sources in the hot aisle or in places which lacks cooling air in the cold aisle The T H sensors outside the cabinet must be near the air conditioner to sense the temperature of the outlet air and must be away from the air exhaust vents of ot...

Page 86: ... are connected to the main control board When connecting the T H sensors outside the cabinet connect the OUT port of one T H sensor inside the cabinet to the IN port of the next T H sensor outside the cabinet Connect all T H sensors in series in this way The T H sensors should be 1 5 m above the ground 33 U Each air conditioner supports a maximum of ten T H sensors Step 2 Set the DIP switches of T...

Page 87: ...3 ON OFF ON ON OFF OFF Cold aisle 4 temp humid 14 OFF ON ON ON OFF OFF Cold aisle 5 temp humid 15 ON ON ON ON OFF OFF Hot aisle Hot aisle 1 temp humid 21 ON OFF ON OFF ON OFF Hot aisle 2 temp humid 22 OFF ON ON OFF ON OFF Hot aisle 3 temp humid 23 ON ON ON OFF ON OFF Hot aisle 4 temp humid 24 OFF OFF OFF ON ON OFF Hot aisle 5 temp humid 25 ON OFF OFF ON ON OFF The default addresses of T H sensors ...

Page 88: ...The water inlet solenoid valve is secured reliably and steadily Passed Failed The humidifier water pump is secured reliably and steadily Passed Failed The wet film is secured reliably and steadily Passed Failed The humidifier float is secured The fasteners for the humidifier float are secured Passed Failed Water inlet pipes are connected securely without leaks Passed Failed Compressor The sheet me...

Page 89: ... ties of the condensate water pipe are reliably secured Passed Failed All pipes are secured reliably and steadily Passed Failed All pipes are wrapped with thermal insulation foam and the insulation foam is intact Passed Failed The water pipe joints are sealed by sealant Passed Failed Check that the needle valve plug is secured torque of 0 45 0 05 N m and valve bonnet is tightened Passed Failed The...

Page 90: ...hus incurred 4 1 1 Refrigerant Charge Amount Refrigerant R410A from name brands such as DuPont Daikin and Honeywell is recommended Table 4 1 Refrigerant Length of the One Way Connection Pipe Between the Indoor and Outdoor Units L Refrigerant Charge Amount NetCol500 036 NetCol500 036 Including a Low Temperat ure Component NetCol500 0 72 L 10 m Standard charge amount kg 9 2 20 2 13 2 10 m L 60 m Ref...

Page 91: ...e may occur if the cooling system is not vacuumized or is not thoroughly vacuumized Ensure that the cooling system is thoroughly vacuumized before refrigerant is charged Procedure Step 1 Check whether a low temperature component is installed on the outdoor side If no low temperature component is installed on the outdoor side connect the pressure gauge and vacuum pump at the low pressure and exhaus...

Page 92: ...cooling system may not be sealed properly or there may be too much refrigerant or water residues in the cooling system Step 3 After 20 minutes the pressure gauge pointer should be in the negative area and the vacuum pump makes small noise Close and open the pressure gauge alternatively for several times The position of the pressure gauge pointer and the sound made by the vacuum pump do not obvious...

Page 93: ...1 hour and make sure the displayed pressure does not increase obviously End 4 1 3 Precharging Refrigerant Prerequisites Before charging refrigerant ensure that air is exhausted from the gas pipe connecting to the refrigerant cylinder Context Wear antifreeze gloves when performing refrigerant related operations Charge refrigerant R410A right after checking that the cooling system does not leak and ...

Page 94: ...17 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 86 Figure 4 3 Precharging refrigerant into the system without a low temperature component 1 Refrigerant cylinder 2 Electronic scale 3 Pressure gauge 4 Connection nut 5 Low pressure needle valve 6 Exhaust pipe needle valve ...

Page 95: ...ure gauge Tighten the nut when cold air escapes out of the nut Step 3 Put the refrigerant cylinder upside down on the electronic scale Clear the reading on the balance If the R410A refrigerant is provided by Huawei put the refrigerant steel vessel upside down when charging in the refrigerant If the refrigerant is not provided by Huawei check with the refrigerant provider whether the steel vessel h...

Page 96: ...st be more than half of the total charge amount calculated and less than the total charge amount If refrigerant is not charged to the total amount in the precharging process charge the remaining amount of refrigerant during power on commissioning For details about commissioning see 4 7 Charging the Remaining Refrigerant Step 6 After refrigerant charging close pressure gauge valves and the refriger...

Page 97: ...rrectly connected refrigerant pipes are connected and refrigerant has been precharged Step 10 Verify that fan switches Fan1 Fan10 are turned on End 4 3 Power On Context All switches are set to OFF before delivery If the preset status is changed restore the preset status before any operation Procedure Step 1 Turn on the air conditioner switch in the upstream PDC Step 2 Turn on the switch QF3 that c...

Page 98: ... advanced menu are the delivery parameters The admin user can access customer delivery maintenance and R D parameters Parameters in the advanced menu are the R D parameters For system security purposes change the preset password after first login For details about changing the password see 6 16 How to Modify a Password If you forget the password restore preset password by referring to 6 17 Restori...

Page 99: ...ning preheating time choose Running Device Details Compressor on the home screen Figure 4 8 Remaining compressor preheating time 4 4 Home Screen You can tap the menu items buttons or icons on the screen to enter related screens or perform operations such as Running Alarms and Settings The controller main screen is shown in Figure 4 9 User interfaces displayed in this document correspond to the ACC...

Page 100: ...tes properly with the main control board If is displayed in this position in the status bar the communication fails 3 USB status in the status bar indicates that the USB flash drive is successfully connected to the display panel 4 Diagnostic mode in the status bar indicates that the precision air conditioner is in diagnostic mode Tap the icon to exit from the diagnostic mode 5 The buzzer status Th...

Page 101: ...all active alarms 11 Login button Logout button indicates that you have not logged in to the system and can tap the icon to log in indicates that you have logged in to the system as admin or operator user and can tap the icon to log out 12 Teamwork control button indicates that there is no teamwork control at present indicates that there is teamwork control without alarms at present indicates that...

Page 102: ...precision air conditioner Supply air Select Supply air to control the temperature and humidity around the air supply vent of the precision air conditioner Cold aisle For a cold aisle select Cold aisle to control the temperature and humidity of the aisle The temperature and humidity values come from the humidity and temperature sensor in the aisle Hot aisle For a hot aisle choose Hot aisle to contr...

Page 103: ...e electric heater will not be started Enabled when active pwr indicates that the electric heater will be started when the main power is active and the ambient temperature is lower than the certain temperature range of the temperature set point Heat mode Sets the starting mode of the electric heater If Dehumid heat is selected the electric heater starts heating based on the current temperature only...

Page 104: ...r water overflow alarm is generated port 1 for reporting common alarms generates a dry contact close alarm and port 2 for reporting common alarms does not function When DO associated alarm is set to Critical major ALM if a critical alarm is generated port 1 for reporting common alarms generates a dry contact close alarm if a major alarm is generated port 2 for reporting common alarms generates a d...

Page 105: ...Supply air can be set as required The temperature and humidity set points correspond to the selected control type can be set Return air Select Return air to control the temperature and humidity around the air return vent of the precision air conditioner Supply air Select Supply air to control the temperature and humidity around the air supply vent of the precision air conditioner Cold aisle For a ...

Page 106: ... Set this parameter as required Return air temperature 26 35 C recommended Supply air temperature 18 24 C recommended Cold aisle temperature 18 24 C recommended Hot aisle temperature 26 35 C recommended Ctrl humid setpoint at ctrl point After the T H control type and the humidity value under this type are set the device conducts humidifying or dehumidifying based on the settings Set this parameter...

Page 107: ...e pressure difference control The default value is 10 Pa When there are partial hot spots indoors you are advised to raise the value to ensure that the air volume of the indoor fans is between 60 70 Side pressure diff sensor type Sets the measuring range for the air side differential pressure sensor There is no default value Set it to 0 50 Pa Indoor fan min speed Sets the minimum speed for the ind...

Page 108: ... Parameter Setting Method IP assigning mode Set according to the actual plan IP address Set according to the actual plan Subnet mask Set according to the actual plan Gateway Set according to the actual plan Step 3 Tap Submit End 4 5 5 Setting Communications Parameters WiFi Settings Prerequisites After connecting the WIFI module of the USB interface to the USB port of the air conditioning display W...

Page 109: ...on for the first time you need to set a password the WiFi has no default password Enable WiFi Enable the WiFi function The default status is Disable Step 3 Tap Submit End 4 5 6 Setting Communications Parameters Modbus Settings Context To set communications parameters log in as the admin user If Link mode is Server a precision air conditioner can be accessed by a maximum of two element management s...

Page 110: ...on the EMS Comm address 1 255 Set the communication address of the precision air conditioner as planned The EMS communicates with the precision air conditioner through this address and the communication addresses of two precision air conditioners connecting to the same EMS must be unique End Setting Parameters for Modbus TCP Step 1 On the home screen choose Settings Comm Settings Modbus Settings F...

Page 111: ...ink mode is set to Server Network IP N A Enter the actual IP address of the EMS IP addresses of the display panel EMS client and EMS server must be unique This parameter is configurable when Link mode is set to Client Network port N A It is recommended that you retain the default value 16100 If you need to change the value enter a value as required This parameter is configurable when Link mode is ...

Page 112: ...you set SNMP Version to ALL or SNMPv1 v2c you can set Read Community and Write Community by performing Step 3 If you set SNMP Version to ALL or SNMPv3 you can add SNMPv3 users by performing Step 4 Step 3 Set Read Community and Write Community 1 Tap the text box after Read Community as shown in Figure 4 16 Set Read Community as planned tap and then tap Submit Figure 4 16 Setting read community 2 Ta...

Page 113: ... that you set Auth Protocol to SHA and set Prop Protocol to AES The following operations use the recommended settings as an example Figure 4 18 Setting the protocol type Passwords of an authentication protocol and proprietary protocol must comply with the following policies The password must consist of 8 15 characters and contain at least two types of characters among uppercase letters A Z lowerca...

Page 114: ...t Huawei Technologies Co Ltd 106 Figure 4 19 Setting an SHA password 4 Set AES Password and Confirm Password as planned and tap as shown in Figure 4 20 Figure 4 20 Setting anAES password 5 Tap Submit Step 5 Tap the text box after SNMP Port as shown in Figure 4 21 Set SNMP Port to the actual port number tap and then tap Submit Figure 4 21 Setting SNMP port ...

Page 115: ...Pv3 user is configured it is recommended that SNMP Version be set to SNMPv3 4 If SNMP Version is set to SNMPv3 select an SNMPv3 user name and then tap as shown in Figure 4 22 Figure 4 22 Setting SNMP trap parameters 5 Tap Submit under SNMP Trap End Follow up Procedure After a USB flash drive has been inserted into the controller USB port and successfully identified tap Export File under MIB File t...

Page 116: ...adjacent areas as one that is assign one teamwork group number for them At most four teamwork groups can be assigned 1 4 Teamwork unit address The address for the precision air conditioner in the same group cannot be the same address range 1 32 The precision air conditioner addressed 1 is the master one that collects processes and delivers data It is recommended that you set the unit address numbe...

Page 117: ...ntrolled group which is the same for all the devices in the group Set the assigned teamwork control number 1 Teamwork unit address Only one device in each group can be set to 1 Other device addresses should be different from each other Set the assigned unit address NA Teamwork CAN resistor enable Indicates the build out resistor status of each precision air conditioner in a teamwork group Set this...

Page 118: ...CAN bus MAC_CAN teamwork control over an FE port MAC_CAN Total number of units Number of the precision air conditioners in this group 1 to 32 can be set Total number of the precision air conditioners in this group 3 Number of running units Number of active units in a group The value ranges from 1 to Total number of units The master unit assigns the devices to be active units by the device number b...

Page 119: ...he master device and other parameters to the slave device and all the precision air conditioners in the group refer to the mode delivered by the master device When the requirement control is Indoor fan unify ctrl or Centrl load distribut all air conditioner fans in the group rotate at the same speed Avoid competit run is recommended for the following scenario In one teamwork the temperature and hu...

Page 120: ...ir conditioner is shut down NA indicates that the precision air conditioner is offline 2 01 02 03 Indicates the device address 01 is the master one and the rest are all slave ones NOTE If the master one offline the teamwork networking failed 3 Active Stand by Active properly responds to the requirement control Standby responds to the requirement control when Active is faulty critical alarms shutdo...

Page 121: ...ogy is the same as the actual device number If yes go to 2 If no check the cable connection and the settings of teamwork control parameters 2 Check whether the number of active devices on the topology is the same as the actual device number If yes go to 3 If no check the cable connection and the settings of teamwork control parameters 3 Check whether the number of standby devices on the topology i...

Page 122: ...f the remote dry contact and On Off status on remote is on by default The operations that start the air conditioner successfully by the display button or by element management system EMS is effective only when the remote dry contact or On Off status on remote is on the status of on Prerequisites Download the Service Expert app from Huawei app store and runs on Android Step 1 Tap Start on the home ...

Page 123: ...rt app User interfaces displayed in this document correspond to the APP software version V100R001C00B043T007 and are for reference only If the initial startup verification is passed startup verification is not required afterwards After factory settings are restored re verification for startup is required Step 3 Open the Service Expert app Step 4 Tap StartUp on the home screen of the app and the sc...

Page 124: ...ir Conditioner User Manual 4 Commissioning Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 116 Figure 4 29 Offline activation Step 5 Tap Offline Activation and the screen shown in Figure 4 30 is displayed ...

Page 125: ...assword you enter is incorrect the generated password will be invalid for the sake of security The initial startup verification fails Step 7 Tap Password on the home screen of the ACC and enter the generated startup password in the displayed dialog box Step 8 After you power on the air conditioner the screen displays the Wizard Startup screen If the refrigerant is charged exactly as required compl...

Page 126: ...as shown in Figure 4 3 If there are low temperature components open the low pressure valves of pressure gauge 1 and pressure gauge 2 and charge the remaining refrigerant from the low pressure needle valves in small flow or intermittently as shown in Figure 4 4 Step 2 On the home screen choose Running Device Details Compressor and view Suction pressure and Discharge pressure to determine whether th...

Page 127: ...e Maint Wizard Startup to enter the Wizard Startup screen Tapping No or Exit submission timeout and system exception all result in commissioning failures Choose Maint Wizard Startup to enter the Wizard Startup screen for new commissioning Procedure Step 1 On the home screen choose Maint Wizard Startup as shown in Figure 4 31 Figure 4 31 Startup wizard For the initial startup wizard Last record is ...

Page 128: ...4 33 Selecting commissioning items If the system is not configured with the electric heater and humidifier components the electric heater and humidifier commissioning items will not appear on the screen If the heating function and humidification function are disabled you cannot select the electric heater and humidifier items All the items are selected by default if you first enter the screen where...

Page 129: ...ls startup wizard ends Step 6 After the fan commissioning the electric heater commissioning screen is displayed Use a clamp meter to detect the currents of cables L1 L2 and L3 Enter the detected values on the screen and tap Submit within the time limit displayed on the screen The controller automatically determines whether the current of the air conditioner is within the normal range If the curren...

Page 130: ... Figure 4 36 Electric heater commissioning Step 7 After the electric heater commissioning the humidifier commissioning screen is displayed Verify that the main water inlet valve is open Check whether the humidifier pipes and the solenoid valve leak If yes select Leak and tap Submit The commissioning has failed Locate and repair the leak points If no select No leak and tap Submit within the time li...

Page 131: ...imit displayed on the screen If no select No and tap Submit The commissioning has failed Locate and rectify the faults of the condensate pump Figure 4 38 Condensate pump commissioning Step 9 After the condensate pump commissioning the cooling system commissioning screen is displayed Check whether the electric heating belt is firmly attached to the compressor outer wall and whether there is noticea...

Page 132: ...ight Huawei Technologies Co Ltd 124 Figure 4 39 Cooling system commissioning Step 10 View the commissioning result Figure 4 40 is displayed if component commissioning succeeds Figure 4 40 Commissioning successfully Figure 4 41 is displayed if component commissioning fails which ends startup wizard commissioning Figure 4 41 Commissioning unsuccessfully ...

Page 133: ...Assembly Adjust the air deflecting assembly on the inner side of the front door to a proper angle based on actual needs The air deflecting assembly can be adjusted to 30 60 90 120 and 150 90 by default Figure 4 43 uses adjusting the air deflecting assembly to 30 as an example to illustrate how to adjust air deflecting assemblies 1 Raise the button on the top of the air deflecting assembly and the ...

Page 134: ...gies Co Ltd 126 Figure 4 43 Adjusting the air deflecting assembly 3 Put down the button 4 9 Optional Power off Context In shutdown mode the Shutdown button is green unavailable and the Start button is gray available Procedure Step 1 Tap Shutdown on the home screen A warning is displayed indicating whether to shut down the precision air conditioner as shown in Figure 4 44 ...

Page 135: ... to operate the QF4 Step 4 Optional If the air conditioner needs to be maintained in power off mode or long term power off switch off the air conditioner circuit breaker on PDC End 4 10 Checking After Commissioning Table 4 13 lists the commissioning checklist Table 4 13 Commissioning checklist Check Item Actual Result No oil stain exists on the copper pipe thermal insulation foam or bottom plate o...

Page 136: ...ngs System Settings T H Sensor T H control type Temp set point Humid set point Choose Common Functions Operating Info or tap Running Operating Info Current temperature Current humidity Rated power voltage Measured power voltage Choose Running Device Details Compressor Discharge temp Discharge pressure Suction pressure Tap Teamwork Teamwork function Choose Teamwork Teamwork Settings Total number of...

Page 137: ...sor generates no metal friction noise or collision noise from inside Replace the compressor Wet film humidif ier The humidifier float has no scale and humidifier float functions properly Clean or replace the humidifier float The wet film and humidifier water pan are clean and have no scale Replace the wet film humidifier The wet film should be replaced every 12 months 5 4 10 Replacing the Wet Film...

Page 138: ...he Remaining Refrigerant If the pressure is beyond the normal range contact Huawei technical support No water exists under the water pipe or on the thermal insulation foam If drops of water are evenly distributed wipe off them with a dry cloth If there are large water marks close the water inlet sluice and process the leak points If the thermal insulation foam is damaged or missing lay out new the...

Page 139: ...y as well as the operating status and time of the compressor fan electric heater electric humidifier and water pump from the monitoring system View the historical alarms generated in this quarter and select the most common five ones If no monitoring system is available skip this item Rectify the fault or contact Huawei technical support Wet film humidifier Start the indoor unit Choose Maint Diagno...

Page 140: ...otal load exceeds 80 of the total cooling capacity of the air conditioner Huawei recommends increasing the number of air conditioners Table 5 4 Yearly maintenance checklist Compon ent Item Quarterly Maintenance Troubleshooting Sensor Use a high precision humidity and temperature sensor to calibrate the humidity and temperature sensors inside and outside the cabinet If the temperature deviation is ...

Page 141: ...eturn air HT Critical The alarm is generated 1 The load is high or the refrigeration capacity is insufficient 2 The ambient temp is high 3 The return air HT alarm threshold is inappropriate 4 The temp displayed is different from the actual temp 1 Add more air conditioner units or Consult Huawei technical support 2 Check other causes if the alarm persists after startup 3 Adjust the return air HT al...

Page 142: ...y 7 The refrigerant is overfilled 1 Check the power supply of the outdoor unit 2 Check the cables to outdoor unit 3 Clean the condenser fins 4 Maintain or replace the outdoor unit or unit driver 5 Check the cables to the high pressure switch 6 Maintain or replace the high pressure switch 7 Decrease certain amount of refrigerant a009 Comp HP switch lock Critical The alarm is generated and the compr...

Page 143: ... Maint Performance Maint to clear the accumulated runtime a023 Electric heater HT Major The alarm is generated and the electric heater shuts down forcibly 1 The temperature switch probes are located inappropriately 2 The cables to the temp switch of the elec reheat are loose or damaged 3 The temp switch is faulty 4 The manual reset temperature switch is not reset 5 The indoor fans are faulty 1 Adj...

Page 144: ...alarm is generated and the system shuts down 1 The power supply voltage is too high 2 The SPD three phase test board is faulty 1 Check the power supply voltage Ensure that the voltage is within the operating range 2 Replace the SPD three phase test board a030 Power phase C overvolt Major The alarm is generated and the system shuts down 1 The power supply voltage is too high 2 The SPD three phase t...

Page 145: ...hase test board is faulty 1 Check the power supply frequency Ensure that the frequency is within the operating range 2 Replace the SPD three phase test board a038 Liquid pipe temp sensor fault Major The alarm is generated 1 Cables to the liquid pipe temp sensor are not properly connected 2 The liquid pipe temp sensor is faulty 1 Check cables to the liquid pipe temp sensor 2 Maintain or replace the...

Page 146: ...e teamwork cables 3 Change the addresses of the air conditioner units 4 Configure one air conditioner unit as the master unit 5 Power on the master unit or configure another unit as the master unit a046 Comp freeze point protection Major The alarm is generated and the compresso r shuts down forcibly 1 The solenoid valve is faulty 2 The cables to the low press sensor are loose or damaged 3 The low ...

Page 147: ...s inappropriate 5 The temp displayed is different from the actual temp 1 Adjust the position of the T H sensors 2 Add more air conditioner units or Consult Huawei technical support 3 Check other causes if the alarm persists after startup 4 Adjust the cold aisle HT alarm threshold 5 Calibrate or replace the abnormal sensors a051 Hot aisle HT Critical The alarm is generated 1 The T H sensors are loc...

Page 148: ...oose or damaged 2 The press sensor is faulty 1 Check the cables to the press sensor 2 Replace the press sensor a057 Comp discharge HP Major The alarm is generated and the compresso r shuts down 1 The outdoor unit input power has an open phase incorrect phase sequence or is unavailable 2 Signal cables to the outdoor unit are not properly connected 3 The condenser fins are blocked 4 The outdoor fan ...

Page 149: ...Maintain or replace the indoor fans 7 Check the ambient temp a061 Comp suction LP lock Critical The alarm is generated and the compresso r is locked and not allowed to be started The a060 comp LP alarm is generated frequently Refer to the solutions for the a060 comp LP alarm a062 Comp drive alarm Major The alarm is generated and the compresso r shuts down 1 The comp driver is faulty 2 The comp is ...

Page 150: ...ain or replace the outdoor units 4 Decrease certain amount of refrigerant 5 Maintain or replace the comp a068 Comp drive overcurren t Major The alarm is generated 1 The comp is in lack of oil 2 The condenser fins are blocked 3 Outdoor fans run abnormally 4 The refrigerant is overfilled 5 The comp is faulty 1 Fill oil to the comp 2 Clean the condenser fins 3 Maintain or replace outdoor fans 4 Decre...

Page 151: ... and the compresso r shuts down 1 The comp is in lack of oil 2 The condenser is blocked 3 Outdoor fans run abnormally 4 The refrigerant is overfilled 5 The comp is faulty 1 Fill oil to the comp 2 Clean the condenser fins 3 Maintain or replace outdoor fans 4 Decrease certain amount of refrigerant 5 Maintain or replace the comp a077 Indoor fan 1 2 3 4 5 6 7 8 9 or 10 fault Major The alarm is generat...

Page 152: ...the condensate pump Tap Maint Performance Maint to clear the accumulated runtime a093 High humidity Warning The alarm is generated 1 The load is low 2 The ambient humidity is high 3 The T H sensors are located in inappropriate position 4 The high humidity alarm threshold is inappropriate 5 The temp displayed is different from the actual temp 1 Please consult Huawei technical support 2 Check the am...

Page 153: ...The cables to the T H sensor are loose or damaged 2 The DIP switch of the T H sensor is set incorrectly 3 The T H sensor is faulty 4 The communication port of the control board is faulty 1 Check the cables to the T H sensor 2 Set the DIP switch of the T H sensor correctly 3 Maintain or replace the T H sensor 4 Maintain or replace the control board a111 Hot aisle 1 2 3 4 5 temp invalid Major The al...

Page 154: ...nits a118 Main power off Major The alarm is generated 1 The primary power supply is faulty 2 The cables to the primary power supply is loose 1 Check the primary power supply 2 Check the cables to the primary power supply a119 L1 L2 linkage condition not met Major Cables to the temperatur e sensor in the cabinet are not properly connected 1 The cables to the cabinet temperature sensor are loose or ...

Page 155: ...and the humidifier shuts down The water inlet solenoid valve is faulty Replace the water inlet solenoid valve a134 Suction temp sensor fault Major The alarm is generated 1 Cables to the suction temperature sensor are not properly connected 2 The suction temperature sensor is faulty 1 Check cables to the suction temperature sensor 2 Maintain or replace the suction temperature sensor a136 EEV low ov...

Page 156: ... circuited or grounded 2 The fan is faulty 3 The power grid voltage exceeds the upper threshold 1 Replace the driver output cable 2 Replace the fan 3 Power off and verify that the input power supply voltage meets the specifications a146 Outdoor fan blocked Major The alarm is generated The fan is blocked Clean the fan and remove obstacles to ensure that the fan works properly a147 Outdoor fan Dr OP...

Page 157: ...m is generated 1 The fan is faulty 2 The ambient temperature exceeds the upper threshold 1 Replace the fan 2 Power off and power on after the ambient temperature drops to a proper level a156 Inverter output U overcurren t Major The alarm is generated 1 The driver output cable is grounded 2 The driver output cable is short circuited 3 The fan is faulty 1 Cut off the three phase power supply and che...

Page 158: ...ced Check whether the fan is faulty a162 Outdoor fan pres sensor fault Warning The alarm is generated 1 A cable of the pressure sensor is loose 2 The pressure sensor is faulty 1 Secure the pressure sensor terminals 2 Replace the press sensor a163 Outdoor fan overtemp Major The alarm is generated 1 The fan overtemperature feedback cable is loose 2 The outdoor unit is dirty and blocked 3 The fan is ...

Page 159: ...r grid is unstable 2 The phase B cable is faulty 1 Check the power grid 2 Check the phase B cable is faulty a171 Power phase C open Critical The alarm is generated and the system shuts down 1 The power grid is unstable 2 The phase C cable is faulty 1 Check the power grid 2 Check the phase C cable is faulty a172 SPD 3 phase test board comm fault Major The alarm is generated 1 The communications cab...

Page 160: ...l cables to the cabinet T H sensor are loose or damaged 3 All aisle T H sensor of an air conditioner is faulty 4 All cables to the aisle T H sensor of an air conditioner are loose or damaged 5 All DIP switch of the T H sensor is set incorrectly 6 All communications port of the control board is faulty 7 The ETH converter is faulty 8 The smart socket is faulty 1 Maintain or replace the cabinet T H s...

Page 161: ...time Maintain or replace the humidifier pump and clear the accumulated runtime a182 Water Supply Alarm Major The alarm is generated and the humidifier shuts down 1 The water supply is insufficient 2 The humidifier float has dropped and is jammed 3 The humidifier float interconnection terminals are abnormal 4 The water inlet solenoid valve cannot open 5 Cables of the water inlet solenoid valve are ...

Page 162: ...ng Certain circuits in the air conditioner have lethal voltages Only professional technicians are allowed to perform maintenance Exercise caution during live line troubleshooting If jumpers are used for troubleshooting remove them after troubleshooting Connected jumpers may affect control functions and damage equipment Table 5 6 describes how to troubleshoot the NetCol5000 A Table 5 6 Troubleshoot...

Page 163: ...outdoor fan fails Check whether the outdoor fan works Refrigerant is insufficient Increase the amount of refrigerant filled The compressor exhaust temperature is too low The outdoor fan speed controller fails Replace the speed controller Refrigerant is insufficient Increase the amount of refrigerant filled Refrigerant is leaking Check the pipeline for any leakage The compressor suction temperature...

Page 164: ... checking the electric heater resistance properties with an ohmmeter No water is supplied to the water inlet solenoid valve of the humidifier The upstream water supply is faulty or the water pressure is below the lower threshold Restore the water supply The water inlet solenoid valve is blocked or faulty Replace the water inlet solenoid valve The cable to the water inlet solenoid valve is incorrec...

Page 165: ...e environment humidity is too high shut down the fresh air system In modular datacenter open the modular doors and ceilings or open some false panel on the IT rack Power failures occur on the active and standby routes 1 The input power has an open phase 2 The contactor fuse in the active route is damaged 3 The interlock contactor and middle contactor are damaged 1 Rectify the power supply fault 2 ...

Page 166: ...rcuited If the fault persists contact Huawei technical support 5 4 Parts Replacement After replacing any part verify that the new part works properly 5 4 1 Replacing the Air Filter Prerequisites The air filter needs to be replaced Spare air filters of the same model are available and functional Context The air filters need to be maintained from the rear door Procedure Step 1 Open the rear door rot...

Page 167: ...r Step 3 Remove the lower air filter in the same way Step 4 Install new air filters in an inverse order Note the following during the reinstallation Install air filters as instructed by the labels thereon and avoid reverse installation Check that the pressure tube is properly connected Step 5 On the LCD home screen choose Maint Performance Maint and clear the air filter runtime End 5 4 2 Replacing...

Page 168: ...tie Context The indoor fan can be maintained only from the front door Replacing fan 9 is used as an example Procedure Step 1 Open the front door and switch off the circuit breaker for the faulty fan 9 Figure 5 3 Switching off the circuit breaker for the faulty fan 9 switch Step 2 Cut the cable ties that bind the cable connected to the faulty fan and remove the fan terminals Take out the faulty fan...

Page 169: ...Confidential Copyright Huawei Technologies Co Ltd 161 Figure 5 5 Installing a new fan Step 4 Switch on the circuit breaker for the faulty fan 9 and close the front door Figure 5 6 Switching on the circuit breaker for the faulty fan 9 Step 5 Power on the device On the LCD home screen choose Maint Performance Maint and clear the indoor fan runtime ...

Page 170: ...h Prerequisites The differential pressure switch needs to be replaced A spare differential pressure switch of the same model is available and functional Tool Phillips screwdriver Context The differential pressure switch can be maintained only from the rear door Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because th...

Page 171: ...5 8 Removing a differential pressure switch Step 4 Use a Phillips screwdriver to remove the screws on the top cover of the differential pressure switch and cable screws as shown by 2 in Figure 5 8 and remove the cables Step 5 Use a Phillips screwdriver to remove the four screws and remove the differential pressure switch as shown by 3 in Figure 5 8 Step 6 Set the new differential pressure switch t...

Page 172: ...oprietary and Confidential Copyright Huawei Technologies Co Ltd 164 Figure 5 9 Setting values for a differential pressure switch Step 7 Install the new differential pressure switch and the pressure tube and connect the cables Figure 5 10 Installing a differential pressure switch Step 8 Install the air filter and close the rear door ...

Page 173: ...ric heating belt Air is sucked from the outside and exhausted from the position in the center A variable frequency scroll compressor uses a frequency converter and generates different air volumes as the frequency changes thereby increasing or reducing the cooling and heating capacity When the compressor operates at a high speed it generates a large heating or cooling capacity which enables the roo...

Page 174: ...table nut 3 Pipe nut Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because the device is still energized after it is shut down on the controller home screen Step 2 Open the rear door and remove the air filter Step 3 Reclaim the refrigerant Step 4 Remove the electric heating belt Step 5 Remove the cover of the connect...

Page 175: ...re 5 12 Removing the electric heating belt and compressor power cables Step 6 Remove the compressor 1 Heat the air intake angle valve joints using a heat gun for 10 minutes Secure the angle nut and pipe nut on the air intake side as shown by 1 in Figure 5 13 using two 30 adjustable wrenches respectively Then loosen the adjustable nut using a 36 adjustable wrench to separate the pipe from the angle...

Page 176: ...minutes Secure the angle nut and pipe nut on the air intake side as shown by 2 in Figure 5 13 using two 30 adjustable wrenches respectively Then loosen the adjustable nut using a 30 adjustable wrench to separate the pipe from the angle valve After removing the valve seal the suction vent immediately 3 Remove the two M8 screws below the compressor bracket as shown by 3 in Figure 5 13 using a 13 soc...

Page 177: ...eration and Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 169 Figure 5 14 Removing a compressor bracket Step 7 Secure the new compressor to the bracket again using a solid wrench Figure 5 15 Installing a compressor bracket ...

Page 178: ...ing a 13 socket wrench as shown by 1 in Figure 5 16 Figure 5 16 Installing a compressor angle valve Step 9 Apply red glue from the second to the fourth circles of the inner screw thread of the suction and discharge angle valves Secure the angle valve nuts and pipe nuts as shown by 2 and 3 in Figure 5 16 using two adjustable wrenches and tighten the adjustable nuts using a torque wrench Tighten the...

Page 179: ...nd Precharging Refrigerant Step 12 Check that the phase sequences are correct before starting the system Then choose Maint Diagnostic Mode Enter to check the system pressure and temperature and ensure the refrigerant is charged with an optimal system status see 4 7 Charging the Remaining Refrigerant Ensure that the system is running normally without alarms Step 13 Install the air filter and close ...

Page 180: ... is available and functional Tools refrigerant retrieval device configured based on local conditions Phillips screwdriver nitrogen cylinder refrigerant tank vacuum pump pressure gauge leather hose protective gloves two 27 adjustable wrenches 36 wrench Context Figure 5 19 shows the position of the filter dryer Figure 5 19 Filter dryer position 1 Pipe nut 2 Adjustable nut 3 Filter dryer nut 4 Hold h...

Page 181: ...ge the refrigerant if the local laws and regulations allow Step 4 Remove the filter dryer as shown in Figure 5 20 Filter dryer replacement requires the collaboration of two persons After removing the filter dryer immediately seal the pipe to ensure that the system is clean and moisture does not enter the pipes Figure 5 20 Removing a filter dryer 1 Remove the hold hoops from the filter dryer using ...

Page 182: ...torque for tightening the adjustable nut is 70 N m Figure 5 21 Installing a filter dryer 1 Apply red glue to the third to second last thread circles of the outer screw thread counting from the pipe outlet inward Secure the filter dryer nut and pipe nut using two 27 adjustable wrenches respectively Then tighten the adjustable nut using a 36 adjustable wrench 2 Reinstall the hold hoops Step 7 Perfor...

Page 183: ... Before checking and maintaining the NetCol5000 A ensure that the primary power supply to the NetCol5000 A is disconnected and the drive has been placed without primary power supply for 10 minutes Otherwise electric shocks may occur Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because the device is still energized a...

Page 184: ...nd Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 176 Figure 5 22 Removing cables Step 4 Remove the four screws on the driver using a Phillips screwdriver and pull out the driver as shown in Figure 5 23 Figure 5 23 Removing a driver ...

Page 185: ...ir Conditioner User Manual 5 Operation and Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 177 Step 5 Install the new driver Figure 5 24 Installing a driver Step 6 Connect the new driver cables ...

Page 186: ...eplacing the Liquid Level Detector Prerequisites The liquid level detector needs to be replaced A spare liquid level detector of the same model is available and functional Tool Phillips screwdriver Context A liquid level detector is composed of the conductor outer jacket liquid level detector switch and card pole A liquid level detector rises or drops as the liquid level changes due to the magneti...

Page 187: ...d 179 Figure 5 26 Liquid level detector 1 High liquid level detector 2 Low liquid level detector Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because the device is still energized after it is shut down on the controller home screen Step 2 Open the front door and remove the water pan cover as shown in Figure 5 27 ...

Page 188: ...es Co Ltd 180 Figure 5 27 Removing a water pan cover Step 3 Cut the cable tie securing the liquid level detector and remove the terminal Step 4 Remove the two butterfly nuts on the liquid level detector fastener remove cables from the liquid level detector and remove the liquid level detector and its fastener as shown in Figure 5 28 Figure 5 28 Removing a liquid level detector fastener ...

Page 189: ...emove the liquid level detector as shown in Figure 5 29 Remove screws from the high liquid level detector using a Phillips screwdriver and remove the high liquid level detector Loosen the nuts on the low liquid level detector and move the low liquid level detector upwards to remove it Figure 5 29 Removing a liquid level detector Step 6 Install the new liquid level detector and properly connect its...

Page 190: ...Step 8 Power on the device and tap Startup on the home screen Ensure that the air conditioner is running normally without any alarms End 5 4 8 Replacing the Condensate Pump Prerequisites The condensate pump needs to be replaced A spare condensate pump of the same model is available and functional Tools Phillips screwdriver flat head screwdriver socket wrench Before removing the condensate pump dra...

Page 191: ...ome screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because the device is still energized after it is shut down on the controller home screen Step 2 Open the front door and disconnect the white power cable terminals of the condensate pump at the lower right corner of the cabinet Figure 5 31 Disconnecting the power cable terminals Step 3 Remove the condensate...

Page 192: ... at the water pan drain outlet and remove the hose as shown by 1 and 2 in Figure 5 32 2 Remove the three screws that secure the condensate pump assembly using a socket wrench and pull out the condensate pump assembly as shown by 3 in Figure 5 32 Step 4 Remove the hose clamps on the condensate pump pipes and the condensate pump using a flat head screwdriver pull out the hose and take out the conden...

Page 193: ...in the cabinet Connect the water pipe and secure it using hose clamps Connect the condensate pump power cable Figure 5 34 Installing a condensate pump Step 6 Remove the blockage from the pipe and close the front door Step 7 Power on the device On the LCD home screen choose Maint Performance Maint and clear the condensate pump runtime Figure 5 35 Performance maintenance Step 8 Tap Startup on the ho...

Page 194: ...roller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because the device is still energized after it is shut down on the controller home screen Step 2 Open the rear door and remove the air filter Step 3 Cut the cable ties securing the humidifier pump cable and remove the terminals Step 4 Remove the screws that secure the humidifier pump fastener using ...

Page 195: ...tenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 187 Figure 5 36 Removing a humidifier pump Step 6 Install the new humidifier pump by performing the preceding steps in reverse order connect the hoses and cables and secure them using hose clamps ...

Page 196: ...nologies Co Ltd 188 Figure 5 37 Installing a humidifier pump Step 7 Install the air filter and close the rear door Step 8 Power on the device On the LCD home screen choose Maint Performance Maint and clear the humidifier pump runtime Figure 5 38 Performance maintenance Step 9 Tap Startup on the home screen Ensure that the air conditioner is running normally without any alarms End ...

Page 197: ...r needs to be replaced A spare wet film humidifier of the same model is available and functional Context The wet film humidifier can be maintained only from the rear door Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because the device is still energized after it is shut down on the controller home screen Step 2 Open...

Page 198: ...chnologies Co Ltd 190 Figure 5 39 Removing a wet film humidifier 1 Hold the blue release sleeve and remove the water inlet pipe 2 Loosen the two captive nuts on one side of the wet film humidifier and remove the humidifier Step 4 Install the new wet film humidifier in the original position by performing the preceding steps in reverse order secure the screws and connect the hose ...

Page 199: ...tom of wet film humidifier into the installation position and then put the top into the installation position Fasten the two captive nuts Step 5 Install the air filter and close the rear door Step 6 Power on the device On the LCD home screen choose Maint Performance Maint and clear the humidifier runtime Figure 5 41 Performance maintenance Step 7 Tap Startup on the home screen Ensure that the air ...

Page 200: ...d functional Tool Phillips screwdriver Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because the device is still energized after it is shut down on the controller home screen Step 2 Open the front door disconnect the fan terminals and remove the fan support Figure 5 42 Removing a fan support Step 3 Cut the cable ties...

Page 201: ...tioner User Manual 5 Operation and Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 193 Figure 5 43 Removing an electric heater Step 5 Install the new electric heater in the reverse order of the removal ...

Page 202: ... Conditioner User Manual 5 Operation and Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 194 Figure 5 44 Installing a new electric heater Step 6 Install the fan support and connect the terminals ...

Page 203: ... fan support to avoid reverse installation Step 7 Power on the system On the main screen choose Maint Diagnostic Mode Enter Manually start the electric heater and check that the electric heater works properly Then exit from the diagnostic mode Step 8 Power on the device On the LCD home screen choose Maint Performance Maint and clear the electric heater runtime Figure 5 46 Performance maintenance S...

Page 204: ...s to be replaced A spare electric control box of the same model is available and functional Tool Phillips screwdriver Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Check whether the port is energized Use a multimeter to check that the AC voltage of the port is 0 V Exercise caution because the device is still energized after it is shu...

Page 205: ...al 5 Operation and Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 197 Figure 5 47 Removing cables Step 4 Remove the four screws in front of the strong current box using a Phillips screwdriver as shown in Figure 5 48 ...

Page 206: ... Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 198 Figure 5 48 Removing a strong current box Step 5 Replace the electric control box Ensure that the four screws are tightened when installing the strong current box Step 6 Place the new strong current box in the installation position and secure it ...

Page 207: ...in Figure 5 47 Step 8 Install the air filter and close the rear door Step 9 Power on the device and tap Startup on the home screen Ensure that the air conditioner is running normally without any alarms End 5 4 13 Replacing Main Control Module Auxiliary Power Supply Module or PSU Prerequisites The main control module auxiliary power supply module or PSU needs to be replaced A spare main control mod...

Page 208: ...trol module disconnect the network cables from the main control module The module can be maintained only from the rear door Figure 5 50 Module 1 Main control module 2 Auxiliary power supply module 3 PSU 1 4 PSU 2 Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because the device is still energized after it is shut down...

Page 209: ...Co Ltd 201 Figure 5 51 Removing a module Step 4 Take out the handle and pull out the module from the subrack as shown by 2 in Figure 5 51 When installing a new module ensure that the handle is in the upper part of the module and the HUAWEI logo is in the lower left corner of the module Step 5 Insert the spare module into the corresponding slot and flip the clip upwards to lock the module ...

Page 210: ... tap Startup on the home screen Ensure that the air conditioner is running normally without any alarms End 5 4 14 Replacing the T H Sensor Prerequisites The T H sensor needs to be replaced A spare T H sensor of the same model is available and functional Context The T H sensor can be maintained only from the rear Procedure Step 1 Tap Shutdown on the controller home screen Exercise caution because t...

Page 211: ... from the RS485_IN and RS485_OUT ports on the T H sensor as shown by 1 in Figure 5 53 Step 4 Pull out the T H sensor in the direction shown by 2 in Figure 5 53 Figure 5 53 Removing a T H sensor Before installing a new T H sensor check that the DIP switch setting is consistent with that for the original T H sensor Step 5 Connect cables to the RS485_IN and RS485_OUT ports and install a new T H senso...

Page 212: ...e the rear door Step 7 Power on the device and tap Startup on the home screen Ensure that the air conditioner is running normally without any alarms End 5 4 15 Replacing the LCD Prerequisites The LCD needs to be replaced A spare LCD with the correct software version is available If the LCD software is incorrect upgrade the software by following the instructions in the ACC Software Upgrade Guide To...

Page 213: ...wei Technologies Co Ltd 205 Exercise caution because the NetCol5000 A is still energized when it is being shut down on the LCD Step 2 Open the front door and disconnect cables Figure 5 55 Disconnecting cables Step 3 Hold the LCD screen from the front remove the four screws from the screen using a Phillips screwdriver and then remove the LCD screen as shown in Figure 5 56 ...

Page 214: ...r Manual 5 Operation and Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 206 Figure 5 56 Removing an LCD Step 4 Secure the spare LCD screen to the original position on the front door using a Phillips screwdriver ...

Page 215: ...er User Manual 5 Operation and Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 207 Figure 5 57 Installing an LCD Step 5 Connect the cables to the LCD and close the front door Figure 5 58 Connecting cables ...

Page 216: ...essor or the QF4 that controls the electric heater as shown in A Electric Control Box Layout needs to be replaced A spare switch QF3 that controls the outdoor unit and compressor or the QF4 that controls the electric heater of the same model is available and functional Tool Phillips screwdriver Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in t...

Page 217: ... Removing a faulty switch Step 4 Remove all cables from the faulty switch QF3 or QF4 as shown by 2 in Figure 5 59 Step 5 Push the faulty switch upward and pull it outward at the same time to remove it as shown by 3 in Figure 5 59 Step 6 Fasten the buckle under the new switch to the guide rail Push the buckle upward and press it inward at the same time to install the switch properly as shown by 1 i...

Page 218: ...ose the rear door Step 9 Power on the device and tap Startup on the home screen Ensure that the air conditioner is running normally without any alarms End 5 4 17 Replacing the Contactor Prerequisites The dual power switch contactor AC contactor or electric heater contactor as shown in A Electric Control Box Layout needs to be replaced This part uses KM3 as an example A spare contactor of the same ...

Page 219: ...n the controller home screen Step 2 Open the rear door and remove the air filter Step 3 Remove all cables and terminals connected to the electric control box Step 4 Remove the four screws in front of the electric control box using a Phillips screwdriver as shown in Figure 5 48 Step 5 Remove cables from the faulty contactor Open the contactor buckle and remove the faulty contactor Figure 5 61 Remov...

Page 220: ... the rear door Step 8 Power on the device and tap Startup on the home screen Ensure that the air conditioner is running normally without any alarms End 5 4 18 Replacing the SPD Prerequisites The surge protective device SPD as shown in A Electric Control Box Layout needs to be replaced A spare SPD of the same model is available and functional Tool Phillips screwdriver Procedure Step 1 On the contro...

Page 221: ...ove the air filter Step 3 Remove all cables and terminals connected to the strong current box as shown by Step 3 in 5 4 12 Replacing a Strong current Box Step 4 Use a Phillips screwdriver to remove the four screws in the front of the strong current box as shown by Step 4 in 5 4 12 Replacing a Strong current Box and remove the strong current box Step 5 Remove the SPD cover using a socket wrench rem...

Page 222: ...larms Step 9 Install the air filter and close the rear door End 5 4 19 Replacing the Relay Prerequisites The relay as shown in A Electric Control Box Layout needs to be replaced A spare relay of the same model is available and functional Tool Phillips screwdriver Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercise caution because ...

Page 223: ...ser Manual 5 Operation and Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 215 Figure 5 65 Removing a relay Step 4 Insert the spare relay to the mounting base properly fasten the buckle and connect the cables ...

Page 224: ...s properly without alarms Step 6 Install the air filter and close the rear door End 5 4 20 Replacing the Fuse Prerequisites The fuse as shown in A Electric Control Box Layout needs to be replaced A spare fuse of the same model is available and functional Tool flat head screwdriver Procedure Step 1 On the controller home screen tap Shutdown and turn off the air conditioner switch in the PDC Exercis...

Page 225: ...d Confidential Copyright Huawei Technologies Co Ltd 217 Step 2 Open the rear door and remove the air filter Step 3 Find the fuse to be replaced and open the knife shaped fuse holder Take the fuse out of the fuse holder by using a flat head screwdriver Figure 5 67 Removing the fuse Step 4 Replace the fuse with a new one and close the fuse holder ...

Page 226: ... Maintenance Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 218 Figure 5 68 Replacing the fuse Step 5 Power on the device and ensure that the air conditioner works properly without alarms Step 6 Install the air filter and close the rear door End ...

Page 227: ...reen The temperature curve upper and the humidity curve lower are displayed on the same screen The abscissa shows time The temperature set point is the midpoint temperature on the upper ordinate while the humidity set point is the midpoint humidity on the lower ordinate The temperature and humidity curves show the current average temperature and humidity of the control type You can tap and to zoom...

Page 228: ...Alarms Procedure Step 1 Tap or choose Alarms Query Act Alarms on the home screen to enter the Query Act Alarms screen Figure 6 2 QueryAct Alarms Active alarms are displayed in chronological order The latest generated alarm is displayed in the uppermost row If active alarms exist they are displayed on the alarm bar one by one You can query an alarm on the alarm list in related user manual for preci...

Page 229: ...ith precision air conditioners Some of the alarms can either be cleared automatically or manually Perform operations as required Step 3 Tap Diagnostic Mode to view the diagnosis report Rectify the faults following instructions in the diagnosis report Figure 6 4 Diagnosis report End Follow up Procedure To query historical alarms choose Common Functions Query Hist Alarms or Alarms Query Hist Alarms ...

Page 230: ... logs screen End 6 4 Querying Device Runtime Procedure Step 1 On the home screen choose Maint Performance Maint Figure 6 6 is displayed Figure 6 6 Performance Maint screen End 6 5 Querying Component Status Context You can query component status in the following two ways Enter the Status screen The control or running status of major components such as the compressor EEV indoor fan are displayed ...

Page 231: ...hrough Status choose Common Functions Status or Running Status on the home screen The general component status screen is displayed Figure 6 7 shows the screen displayed after choosing Running Status Figure 6 7 General status When querying component status through Device Details using the T H sensor as an example choose Running Device Details T H Sensor on the home screen to query the status of the...

Page 232: ...enter the menu of a specific component All parameters for the component are displayed Procedure When querying system parameters through Operating Info choose Common Functions Operating Info or choose Running Operating Info on the home screen the related screen is displayed Figure 6 9 shows the screen displayed after choosing Running Operating Info Figure 6 9 Operating Info When viewing system para...

Page 233: ... display board control board and temperature and humidity collection board The E label screen displays electronic labels of the entire system control board display board temperature and humidity collection board SPD three phase test board and auxiliary power source board When some T H boards of the cold or hot aisles are enabled T H Board on the About Version Info screen or T H Board on the About ...

Page 234: ...n when deleting all historical alarms Because this operation may cause clearance of all historical alarms and affects device maintenance Procedure Step 1 On the home screen choose Alarms Delete Hist Alarms Figure 6 13 is displayed Figure 6 13 Delete hist alarms screen Step 2 Tap Yes to delete all historical alarms After alarms are deleted the operation is recorded in logs End 6 9 Deleting Logs Con...

Page 235: ...storical alarms run logs and so on The two export methods are the same This section uses one click mode as an example to describe the export method You are advised to use the FAT32 USB flash drive with a capacity no greater than 64 GB Before using a USB flash drive ensure that its data has been scanned by antivirus software and is secure Before exporting active alarms historical alarms logs and co...

Page 236: ...dialog box and tap Next Then tap Yes in the displayed dialog box Step 3 After the data is successfully exported Figure 6 15 is displayed Click Finish Figure 6 15 Screen showing that data export has succeeded Step 4 Click Maint USB Operations Remove USB to remove the USB flash drive in safe mode End 6 11 Clearing the Runtime Context Performance value clearance can be performed only after component ...

Page 237: ...End 6 12 Calibrating a Sensor Context Calibrate a sensor if the displayed temperature or humidity on the sensor deviates from the actual value For example if the return air temperature measured by other temperature detection devices at the return air detection point is 20 C while the value measured by the sensor is 22 C the sensor has an error of 2 C and the calibration value should be set to 2 C ...

Page 238: ... Calib page can be entered over the screen Calibrating the screen by DIP switch The display board works normally the deviation between the touching point and the responding point is unfavorably big or the screen does not respond when being tapped You can calibrate the screen by DIP switch only when the system enters Quick Settings page after the first power on or when the system is on the home scr...

Page 239: ...on function is triggered After 15 seconds a dialog box indicating Are you sure you want to calibrate the screen If you do not click Yes or No calibration will start automatically 10 seconds later is displayed as shown in Figure 6 20 Figure 6 20 Confirming to calibrate the screen c Wait for 10 seconds or tap Yes Figure 6 18 is displayed Tap the screen When Figure 6 19 is displayed the adjustment is...

Page 240: ...ayed as shown by 1 2 in Figure 4 6 End 6 15 How to Set the Language Date or Time Context Enter the User Settings screen to set Language Date Time or Time zone You can also set Password LCD contrast LCD saturation LCD brightness and LCD backlight off delay on the screen Procedure Step 1 On the home screen choose Settings User Settings Figure 6 21 is displayed Figure 6 21 User Settings screen Step 2...

Page 241: ...odify a password log in as the admin user or operator user You can only modify the password of the current user Procedure Step 1 On the home screen choose Settings User Settings to enter the User Settings screen as shown in Figure 6 22 Figure 6 22 User Settings Step 2 Tap Password to enter the password changing screen as shown in Figure 6 23 It is recommended that the password should contain at le...

Page 242: ...Technologies Co Ltd 234 Figure 6 23 Modifying the password If you forget the password restore the initial password by referring to 6 17 Restoring Factory Settings End 6 17 Restoring Factory Settings Context If you have forgotten the password or need to delete system information you can restore factory settings using DIP switch on the main control module ...

Page 243: ...hutdown on the screen and wait for the system to shut down Step 2 Disconnect the main power supply of the device Step 3 Switch the fourth toggle of the DIP switch on the main control module to ON Figure 6 24 shows the DIP switches on the main control module Figure 6 24 DIP switches on the main control module Step 4 Connect the main power supply of the device Step 5 After the restart completes the ...

Page 244: ...z when a new alarm is generated Procedure Step 1 Tap the icon in the status bar and tap Off to silence the buzzer After the buzzer is silenced the icon changes to End 6 19 How to Enable a Humidity and Temperature Sensor Context A humidity and temperature sensor needs to be enabled after it is installed in an aisle If you need to enable a humidity and temperature sensor log in as the admin user Thi...

Page 245: ...acity indicates the total cooling heating requirements of the group and is used as a reference for enabling the cooling heating mode by the master device If the cascade function is enabled the capacity is used as a reference for determining whether to start a standby unit Required humidity indicates the total dehumidification and humidification requirements of the group and is used as a reference ...

Page 246: ...tings are restored all communication addresses are changed to 1 and the communication between all devices and the EMS is disconnected The communication addresses must be reset to recover the communication 6 22 How to Change the SSH Access Password Context SSH is used only for advanced maintenance Change the preset password in your first login to the controller over SSH Except for password changes ...

Page 247: ... meet the following requirements Contains at least eight characters Contains at least two types of characters lowercase letter uppercase letter digit space and special character _ Be different from the user name or user name in its inverted order If a user enters incorrect passwords for five times the user s account will be locked for 10 minutes Step 3 After successful login enter su and Changeme ...

Page 248: ... Ltd 240 Figure 6 28 Switching to the root user Step 4 Enter passwd the password change command to change the password In the displayed window enter a new password and confirm it as shown in Figure 6 29 Figure 6 29 Changing the password The new password must meet complexity requirements When you are changing the password you can press Ctrl C to stop this operation End ...

Page 249: ... that its data has been scanned by antivirus software and is secure Procedure Step 1 On the home page choose Maint USB Operations Import Certificate as shown in Figure 6 30 Figure 6 30 Importing a certificate Step 2 Select Client certificate or Server certificate based on the type of the certificate in use Step 3 Tap Browse next to Upload CA certificate file Step 4 Select the CA certificate file t...

Page 250: ...guration file Context You are advised to use the FAT32 USB flash drive with a capacity no greater than 64 GB Procedure Step 1 Tap Maint USB Operations Import Config as shown in Figure 6 31 Figure 6 31 Select file Step 2 Select the file that needs to be imported and tap Next as shown in Figure 6 32 Figure 6 32 Confirming the file Step 3 After you tap Yes and Next Figure 6 33 and Figure 6 34 are dis...

Page 251: ...Technologies Co Ltd 243 Figure 6 33 Data process 1 Figure 6 34 Data process 2 Step 4 After the file is imported successfully Figure 6 35 is displayed Then tap Finish Figure 6 35 Importing the file successfully If the file fails to be imported a failure message will be displayed Step 5 Tap Maint USB Operations Remove USB to remove the USB flash drive End ...

Page 252: ...ow Precision Air Conditioner User Manual A Electric Control Box Layout Issue 01 2017 07 27 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 244 A Electric Control Box Layout Figure A 1 Electric control box layout ...

Page 253: ...301 1 Outdoor unit control Outdoor unit control dry contact 2 Outdoor unit control dry contact 3 Smoke sensor Smoke sensor power supply 12 V DC 4 Smoke sensor feedback 5 Port for remote startup and shutdown Port for remote startup and shutdown 6 Port for remote startup and shutdown 7 Water immersion Water leakage detection contact 1 water leakage in the floor 8 Water leakage detection contact 1 wa...

Page 254: ...between the two groups of fans on the front door D Front view of the electri c control box 1 Main power port AC1 2 Backup power port AC2 a 3 Power port for outdoor unit AC3 4 Switch QF3 controlling the outdoor unit and compressor 5 Electric heater switch QF4 6 Compres sor PSU power port X101 connect ed before delivery 7 Electric heater power port X102 connected before delivery 8 Signal port X103 c...

Page 255: ...e sensor 5 Oil separator 6 Check valve 7 Exhaust pipe needle valve 8 Oil trap 9 Outdoor unit 10 Inverted U shaped trap 11 Liquid pipe needle valve 12 Dryer filter 13 Sight glass 14 Liquid pipe temperature sensor 15 Electronic expansion valve 16 Low pressure needle valve 17 Evaporator 18 Indoor fan 19 Distributor 20 Low pressure sensor 21 Suction temperature sensor The pipes shown in real lines in ...

Page 256: ...tings Language Specifies the interface language to Chinese or English Consistent with the current interface language Date format Specifies the date display format for the ACC Consistent with the current interface date format Date Specifies the date displayed on the ACC Consistent with the current interface date Time Specifies the time displayed on the ACC Consistent with the current interface time...

Page 257: ... set a password N A Enable WiFi Enable the WiFi function Disable Settings Comm Settings Modbus Settings Baud rate The baud rate for the communication between the precision air conditioner and the EMS can be set to 9600 and 19200 The value should be consistent with that set on the EMS 9600 Comm address Specifies the address for the communication between the precision air conditioner and the EMS 1 L...

Page 258: ...e alarm threshold for a certain alarm Not displayed Settings System Settings COMM Settings T H control type Cold aisle Hot aisle Return air or Supply air can be set as required The temperature and humidity set points correspond to the selected control type can be set Return air Ctrl temp setpoint at ctrl point After the T H control type and the temperature value under this type are set the device ...

Page 259: ...ier will not be started Enabled when active pwr indicates that the electric humidifier will be started when the main power is active and the ambient humidity is lower than the certain humidity range of the humidity set point Enable Dehumid Enable indicates that the dehumidification function will be enabled when the ambient humidity exceeds the certain humidity range of the humidity set point Disab...

Page 260: ...tive pwr Enable Heat Enable indicates that the electric heater will be started when the ambient temperature is lower than the certain temperature range of the temperature set point Disable indicates that the electric heater will not be started Enabled when active pwr indicates that the electric heater will be started when the main power is active and the ambient temperature is lower than the certa...

Page 261: ...emperature is higher than the threshold under return air hot aisle control 25 0 C DO associated alarm When DO associated alarm is set to Smoke water only if a smoke sensor alarm or water overflow alarm is generated port 1 for reporting common alarms generates a dry contact close alarm and port 2 for reporting common alarms does not function When DO associated alarm is set to Critical major ALM if ...

Page 262: ...essure diff set point When Indoor fan ctrl type is set to Pressure diff ctrl you can modify the parameter If the fan control type is kept to Pressure diff control the device adjusts the speed based on this pressure difference value 10 Pa Side pressure diff sensor type Select the measuring range of the air side pressure difference sensor No Indoor fan min speed Specifies the minimum speed for the i...

Page 263: ...midifier running time pump total runtime Air filter total runtime Total EEV total runtime Total runtime for each component 0h Maint Sensor Adjust Supply air temp adj value Return air temp adj value Return air humid adj value Comp discharge temp adj value Comp discharge pres adj value Comp suction temp adj value Comp suction pres adj value Comp liq pipe temp adj value Side calibrated pressure diffe...

Page 264: ...NetCol 5000 A 42 kW Air Cooled In row Precision Air Conditioner User Manual D Electrical Conceptual Diagram ...

Page 265: ...NetCol 5000 A 42 kW Air Cooled In row Precision Air Conditioner User Manual D Electrical Conceptual Diagram ...

Page 266: ...NetCol 5000 A 42 kW Air Cooled In row Precision Air Conditioner User Manual D Electrical Conceptual Diagram ...

Page 267: ...NetCol 5000 A 42 kW Air Cooled In row Precision Air Conditioner User Manual D Electrical Conceptual Diagram ...

Page 268: ...pyright Huawei Technologies Co Ltd 260 E Acronyms and Abbreviations A AC alternating current C CFD Computational Fluid Dynamics CAN Controller Area Network D DC direct current DIP dual in line package E EC electronic commutation EEV electronic expansion valve EMS Element Management System L LCD liquid crystal display LUI local user interface F FE fast Ethernet N ...

Page 269: ... Proprietary and Confidential Copyright Huawei Technologies Co Ltd 261 NTC negative temperature coefficient P PDC power distribution cabinet PTC positive temperature coefficient PUE Power Usage Effectiveness R RCCB Residual Current Circuit Breaker S SPD surge protective device T TFT thin film transistor U USB Universal Series Bus ...

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