Mitsubishi Electric QAHV Installation & Operation Manual Download Page 15

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[6] Secondary side control system

When employing an indirect heat exchanger system using a separately sold Q-1SCK, be careful with regard to the
following points.
Install the Q-1SCK (flow sensor and temperature sensor) in the secondary side circuit as shown below to perform
control.

(1) Notes on configuring and selecting components

Points to note for secondary side water piping

I Details on components in the unit heating circuit

* For details, refer to page 11.

II Details on components in heat exchanger heating circuit

Schematic Piping Diagram and Piping System Components for secondary circuit

I Unit heating circuit

II Secondary side circuit

III Hot water supply circuit

Temperature sensor

Flow sensor

No.

Component

Application

Remarks and notes on selecting and installing components

Flow sensor
(Optional parts)

Measures and controls
the secondary side flow
rate.

Be sure to install this component between the downstream of the flow rate
adjustment device and the heat exchanger.

Temperature
sensor
(Optional parts)

Measures and controls
the secondary side
outlet hot water
temperature.

Install this component at the outlet of the heat exchanger.

Plate heat
exchanger

Exchanges heat
between hot water
output from the unit and
water input from the
tank.

Select a heat exchanger that is appropriate for the capacity.

Pump + Flow
rate adjustment
device

Outputs hot water from
the secondary side and
adjusts the flow rate.

Select a pump and flow rate adjustment device that are suitable for the system.
Install them at the lower outlet of the tank.

Water piping

Water flow channel

Be sure to perform insulation work.
Select pipes that allow for easy air bleeding.

Anti-freeze
heater

Prevents pipe damage
due to freezing of the
water circuit.

This component needs to be installed in a location where an ambient
temperature may fall to 0

C or less.

Union joint

Improves the workability
of replacing equipment.

Install these components in the two places of the chilled water passage section
and the high temperature water passage section to enable replacement.

䐣䐤

䐟

䐠

䐥

䐬

䐦

䐨

䐩

䐧

䐪

䐡

䐢

䐫

䐭

䐥

䐬

䐦

䐪

䐩

From heat pump unit

To heat pump unit

From storage tank

To storage tank

WT08219X05.book 15 ページ２０１８年１０月１日　月曜日　午後７時４７分

Summary of Contents for QAHV

Page 1: ...bleeding operation and flow rate adjustment operation during test run 33 5 Electrical Wiring Installation 51 1 Main Power Supply Wiring and Switch Capacity 51 2 Wiring for Configuring Secondary Side Control System 53 3 Cable Connections 54 6 Troubleshooting 60 1 Diagnosing Problems for which No Error Codes Are Available 60 2 Diagnosing Problems Using Error Codes 61 3 Calling for Service 66 7 Opera...

Page 2: ... not splash water on electric parts To reduce the risk of electric shock malfunctions smoke or fire do not operate the switches buttons or touch other electrical parts with wet hands To reduce the risk of electric shock and injury from the fan or other rotating parts stop the operation and turn off the main power before cleaning maintaining or inspecting the unit To reduce the risk of burns or fro...

Page 3: ... heat pump is not suitable for use as drinking water or for cooking It may cause health problems or degrade food In areas where temperature drops to freezing during the periods of non use blow the water out of the pipes or fill the pipes with anti freeze solution Not doing so may cause the water to freeze resulting in burst pipes and damage to the unit or the furnishings In areas where temperature...

Page 4: ...ng or floor All drainage work should be performed by the dealer or qualified personnel according to the instructions detailed in the Installation Manual Improper drainage work may cause rain water or drain water to enter the buildings and damage the furnishings Pipe installation To prevent explosion do not heat the unit with refrigerant gas in the refrigerant circuit Check for refrigerant leakage ...

Page 5: ...nit use appropriate tools to install inspect or repair the unit To reduce the risk or malfunction turn on the power at least 12 hours before starting operation and leave the power turned on throughout the operating season Recover all refrigerant from the unit It is punishable by law to release refrigerant into the atmosphere Do not unnecessarily change the switch settings or touch other parts in t...

Page 6: ...g when installing the units in areas where snow or strong winds prevail Avoid direct exposure to rain winds and snow Icicles that may form under the foundation can fall and inflict personal injury or property damage Select the installation site carefully to reduce these risks especially when installing the unit on a roof If the units are installed in the direct line of rain winds or snow install t...

Page 7: ...overall height of the unit Rear 500 mm or lower from the unit bottom Unit height Unit height 500 mm Required minimum distance mm L1 Front L2 Rear L3 Right Left When the distance behind the unit L2 needs to be small 500 300 50 When the wall s at the front and or the right left exceed s their height limits h3 L1 L2 L3 L3 h1 Unit height Unit height 500 When the wall at the rear exceeds its height lim...

Page 8: ... the figures to L1 L2 and L3 as shown in the tables below 1 Side by side installation 2 Face to face installation h2 L2 L1 h1 L4 Ⓐ Ⓐ mm Unit height 500 Required minimum distance mm L1 Front L2 Rear L4 Between 500 h1 300 h2 100 Ⓐ Leave open in two directions When there are walls in the front and rear of the block of units h1 h2 L1 L4 L4 L2 Ⓐ Ⓐ 500 Unit height Required minimum distance mm L1 Front L...

Page 9: ...mum distance mm L2 Right L2 Left L4 Between 300 h2 300 h2 1000 Ⓐ Leave open in two directions When there are two walls in an L shape h2 h3 L2 L4 L3 Ⓐ Ⓐ Unit height 500 Required minimum distance mm L2 Right L3 Right Left L4 Between 300 h2 1000 h3 1000 When the unit is installed above the storage tank Decide the height so that the unit inlet water pressure will not be negative for the tank pressure ...

Page 10: ...t the four corners of the unit The legs on the unit are detachable Detaching the legs Loosen the three screws on the legs to detach each leg two each in the front and back If the finish coat becomes damaged when detaching the legs be sure to touch it up Warning Be sure to install the unit on a surface strong enough to withstand its weight to keep the unit from falling down and causing injury Provi...

Page 11: ...nt or cleaning of the flow adjuster 5 Flexible joint Recommended to prevent the noise and vibration from the pump from being transmitted 6 Drain pipe Install the drain pipe with a downward inclination of between 1 100 and 1 200 To prevent drain water from freezing in winter install the drain pipe as steep an angle as practically possible and minimize the straight line For cold climate installation...

Page 12: ...it is in operation Anti freezing operation will keep the water in the tank circulated and water storage tanks can become thermally stratified Hot water storage operation Anti freezing operation Residual running of the pump The ON OFF control of 3 way valve depends on the output type r EXTERNAL DEVICE on page 58 ...

Page 13: ...ms in which there has been no signs of corrosion If the water quality level has dropped adjust the water quality before replacing the unit 5 Suspended solids in the water Sand pebbles suspended solids and corrosion products in water can damage the heating surface of the heat exchanger and cause corrosion Install a good quality strainer 60 mesh or better at the inlet of the unit to filter out suspe...

Page 14: ...allation example is shown below Note If the crosscut pipe is located lower than the hot water outlet of the heat pump unit raise the pipe near the unit and install an automatic air venting valve 5 Outlet check valve When installing multiple units When connecting multiple units with pipes in parallel install a check valve at the outlet pipe of each unit If a check valve is not installed a circuit i...

Page 15: ...perature sensor Optional parts Measures and controls the secondary side outlet hot water temperature Install this component at the outlet of the heat exchanger 3 Plate heat exchanger Exchanges heat between hot water output from the unit and water input from the tank Select a heat exchanger that is appropriate for the capacity 4 Pump Flow rate adjustment device Outputs hot water from the secondary ...

Page 16: ... equal select a vertically long heat exchanger Select a heat exchanger of which NTU is high although the heat transfer capacity improves as NTU increases the pressure loss becomes high 8 Valve Improves the workability of cleaning the heat exchanger and replacing parts Install these components in the two places of the chilled water passage section and the high temperature water passage section to e...

Page 17: ...g stress using the following method Values required for calculation Relationship between flow rate and pressure loss of corresponding heat exchanger Obtain the data from the heat exchanger manufacturer Calculation method Calculate the shearing stress using the following formula T1 Temperature difference between inlet and outlet T Temperature difference of high temperature part low temperature part...

Page 18: ...e 37 For how to check the flow rate refer to page 38 If the flow rate is not within the range of 20 to 30 ℓ min select a different pump or adjust the maximum frequency using an inverter etc so that the maximum flow rate of 20 to 30 ℓ min is achieved To select a proper pump first select a pump that supports slightly high flow rate and then adjust the frequency with an inverter so that the flow rate...

Page 19: ...ncy 6 Hz or less The motor may be seized depending on the pump selected as this control is performed at a low frequency Select a pump of which flow rate at 100 output is between 20 to 30 ℓ min Notes on inverter selection and connection The inverter needs to be able to adjust output with a 0 to 10 input Select an inverter that will not cause the seizing of the motor Configure the settings so that t...

Page 20: ...i freezing operation of the secondary side circuit matches with the secondary side circuit water temperature criterion Setting procedure and operation overview 2 Purpose and application Prevent piping freezing when the secondary side control is used If the compressor is not run during the anti freezing operation in the secondary side control system there is a risk of the piping of the primary side...

Page 21: ... side control system perform the following operation to perform the secondary side control operation 1 Set the digital setting item 121 to 1 for details on the operating procedure refer to page 28 2 Perform a water flow rate adjustment operation for details refer to Water flow rate adjustment operation when the secondary side control is enabled page 37 Secondary circuit kit Q 1SCK The size and len...

Page 22: ...er to the sections 2 Switch Types and the Factory Settings page 23 and 3 System configuration procedures Individual system page 27 for further details Refer to the sections 2 Switch Types and the Factory Settings page 23 and 4 System configuration procedures Multiple system page 29 for further details Unit MAIN circuit PCB External temperature sensor Field supplied dry contact switch relay or remo...

Page 23: ...osed status before the test run Upper side A under preparation Lower side B auto Always set to the lower side Setting to the upper side forcefully stops the pump and compressor thus the unit does not operate When SWS2 is set to the upper side the display shows P OFF and the setting cannot be made When P OFF appears set SWS2 to the lower side Discharge air outlet Service panel Control box Intake ai...

Page 24: ...t OFF Individual system Multiple system or during AE connection At a reset 10 Display mode switch 7 This switch is used in combination with dip switches SW3 5 through 3 10 and push switches SWP 1 2 and 3 to configure or view the settings when performing a test run or changing the system configuration OFF Changes the 7 segment LED display mode Any time SW3 1 Remote reset Enables or disables the err...

Page 25: ...decrease this value to 58 0 for example press SWP2 Press SWP1 to increase the value 4 To change the settings When the desired value is displayed 58 0 in the example at left press SWP3 Enter The displayed value will stop blinking and stay lit A lit LED indicates that the new setting has been saved Pressing SWP1 or SWP2 will change the blinking setting value but the change will not be saved until SW...

Page 26: ...ntrol end time 4 Hour and minutes 0 00 23 59 16 00 Outlet hot water temperature boiling temperature 9 ºC 40 Secondary contlol disabled 90 0 Secondary contlol enabled 80 0 65 High and low pressure display interval P 1051 Seconds 0 100 3 Low noise operation maximum capacity 1054 0 100 70 Low noise operation start time 1058 Hour and minutes 0 00 23 59 0 00 Low noise operation end time 1059 Hour and m...

Page 27: ...se or incorrect wiring and then switch on the power to the unit When the power is switched on the following codes will appear on the LED EEEE will appear on LED1 in the circuit board labeled A in the figure at right ng is displayed before the water flow rate adjustment operation is performed Cancel the ng display by using one of the following methods Press SWP3 Press SWP1 or SWP2 A ON 1 2 3 4 5 6 ...

Page 28: ...U2 are set as the preset values When AE 200 is connected to QAHV set the preset values referring to the notes below 106 Total number of units in the system Initial value 1 Leave it as it is 107 2 when connected to AE 200 Initial value 0 108 Not used 109 Not used 110 Function setting 1 when connected to AE 200 Initial value 0 111 M NET address of main sensor of own tank Initial value 1 112 to 120 N...

Page 29: ... digit with SWU2 Assign sequential addresses on all sub units starting with 2 3 Set the dip switch SW2 6 to OFF power supply to communication circuit External water temperature sensor Field supplied dry contact switch relay or remote controller PAR W31MAA or centralized controller AE 200 SW2 9 ON Address 1 SW2 6 OFF SW2 9 ON Address 2 SW2 6 OFF SW2 9 ON Address 1 n Inter unit wiring M NET line The...

Page 30: ...e switches on the circuit as necessary Item 106 must be set when multiple units are connected to a system 101 Not used 104 Not used 105 Function setting When AE 200 is not connected to QAHV the values set by rotary switches SWU1 and SWU2 are set as the preset values When AE 200 is connected to QAHV set the preset values referring to the notes on page 31 106 Total number of units in the system Init...

Page 31: ...ormed Refer to 2 Switch on the power to the unit on page 27 for how to cancel ng Slide switch SWS1 settings Individual system Multiple system SWS1 in the SUB circuit on both the main and sub units will be ineffective When connecting AE 200 and remote controller PAR W31MAA simultaneously make the settings above and then turn off the power turn it back on and set 1 for item code 105 for the unit to ...

Page 32: ... a control property 0001 will appear Then five seconds later FFFF will appear If EEEE appears perform the procedures in 2 again ng is displayed before the water flow rate adjustment operation is performed 3 Set the rotary switch SWU3 back to 0 6 Resetting the system Take the following steps to reset the system An error can also be reset by taking the steps below When an error on the MAIN unit is r...

Page 33: ... set to OPEN starting water flow e Stop operation 1 Change the setting of PCB DIP SW1 8 from ON to OFF The pump and motor operated valve 2 are automatically set to CLOSED ending water flow f Stop operation 2 Change the setting of PCB slide SWS1 from LOCAL to REMOTE Step Contents Operation and check points Supplemental explanation a Water level check Check the water level is not the full level Wate...

Page 34: ... the PCB s digital display after the system startup operation Press SWP1 or SWP2 to delete the ng from the PCB s digital display changing the display to C25 Note 1 As a stopgap measure change the settings of SW2 9 and SW2 3 as shown in the table below then restart the power If water shutoff error 2601 occurs during the air bleeding operation remove the cause of the problem then change the setting ...

Page 35: ...formed ng appears after the system startup operation Perform the flow rate adjustment operation in this case Step Contents Operation and check points Supplemental explanation a Water level check Check the water level is neither at the full or empty level Water is supplied even when the target water level has been reached b Power operation Turn the power ON If the startup operation has not finished...

Page 36: ...wer on Note 2 The table below shows the water flow rate adjustment operation status in 4 figures when the PCB DIP switch is set as shown in Note 3 Note 3 PCB DIP switch settings Close Water flow rate adjust valve opening Open Pump output opening water flow rate adjust valve opening 1600 1400 1200 1000 800 600 400 200 100 Flow rate pump output opening 16 d01 d02 d03 d04 d05 d06 d07 d08 d09 Flow rat...

Page 37: ...to display the operation result flow rate characteristic corresponding each flow rate code dxx in Table 1 and write them down Step Contents Operation and check points Supplemental explanation a Water level check Check the water level is neither at the full or empty level Water is supplied even when the target water level has been reached b Power operation Turn the power ON If the startup operation...

Page 38: ... 20 ℓ min and 30 ℓ min Does a value from 1 ℓ min to 4 ℓ min exist for the flow rate at an arbitrary output except 0 If there was no value from 1 ℓ min to 4 ℓ min for the flow rate when any output except 0 the flow rate may not be able to be controlled at a low flow rate Carry out the air bleeding and flow rate adjustment operations again Take a measure such as adjusting the frequency using an inve...

Page 39: ...gures when the PCB DIP switch is set as shown in Note 3 Note 3 PCB DIP switch settings Multiple unit change over switch SW2 9 Local internal change over switch SW2 3 When startup operation has not completed OFF ON When startup operation has completed Water flow rate adjustment operation status Display Not completed ng Completed g In operation ing SW2 SW3 10 5 6 7 8 9 10 ON OFF OFF OFF ON ON OFF ...

Page 40: ...sed Use the push switches SWP1 and SWP2 to change the value of the selected item The value will keep blinking while it is being changed Step 3 Press the push switches SWP1 or SWP2 to increase or decrease the value Step 4 Press the push switch SWP3 to save the change Press SWP3 once within one minute of changing the setting with SWP1 or SWP2 to save the setting Once the new setting is saved the dis...

Page 41: ...isplay will stop blinking and stay lit The display will then return to the item code display mode If SWP3 is not pressed within one minute the change will not be saved and the display will return to the item code display mode SW2 SW3 10 5 6 7 8 9 10 OFF OFF OFF OFF ON OFF OFF Settings table Only for six sensor method Thermistor number 1 TH15 2 TH16 3 TH17 Set the item code 1507 to 3 when using all...

Page 42: ...parately sold TW TH16E temperature thermistor Two or more units are needed to use the six sensor method Make sure to set the unit outlet hot water temperature TH15 temperature Set water temperature Mode 1 Thermo differential value Code 1508 Unit operation start Tank TH17 Tank TH16 TH15 TH17 TH16 TH15 TH17 temperature Set water temperature Unit operation stop Set the operation mode and water temper...

Page 43: ...able SW2 9 ON When multiple units are connected When a remote controller is not connected the setting for item code 105 is not required Address Item code 105 106 107 110 111 1214 1 1 3 2 1 1 1 2 2 3 2 0 1 1 3 3 3 2 0 1 1 1 2 3 PAR W31 Storage tank M NET cable Address Item code 106 110 111 112 1214 1 3 1 1 2 2 2 3 2 1 2 3 3 0 1 2 SW2 9 ON 1 2 3 AE 200 PAR W31 Storage tank M NET cable SW2 9 ON When ...

Page 44: ...e of the selected item The value will keep blinking while it is being changed Step 3 Press the push switches SWP1 or SWP2 to increase or decrease the value Step 4 Press the push switch SWP3 to save the change Press SWP3 once within one minute of changing the setting with SWP1 or SWP2 to save the setting Once the new setting is saved the display will stop blinking and stay lit The display will then...

Page 45: ...he push switches SWP1 or SWP2 to increase or decrease the value Step 4 Press the push switch SWP3 to save the change Press SWP3 once within one minute of changing the setting with SWP1 or SWP2 to save the setting Once the new setting is saved the display will stop blinking and stay lit The display will then return to the item code display mode If SWP3 is not pressed within one minute the change wi...

Page 46: ...nute of changing the settings to save the change When the new setting is saved the display will stop blinking and stay lit The display will then return to the item code display mode If SWP3 is not pressed within one minute the change will not be saved and the display will return to the item code display mode Step 1 Set dip switches SW2 SW3 SW421 1 and SW421 2 SW421 1 SW421 2 4 20 mA ON ON 0 10 V O...

Page 47: ...ature will be linearly interpolated When the water temperature setting input signal type is set to 3 2 10 V External analog input signal of between 2 9 and 9 1 V the preset temperature will be linearly interpolated temp B 90ºC temp A 40ºC 5 9 mA Input current 18 3 mA Preset temperature B A Input current 5 9 mA 12 4 mA A Change of 0 12 mA or less is not recognized temp B 90ºC temp A 40ºC 1 0 V Inpu...

Page 48: ... with the push switch SWP3 Press the push switch SWP3 to select item code 2 Press the push switches SWP1 or SWP2 to change the value of the selected item The value will keep blinking while it is being changed Step 3 Press the push switches SWP1 or SWP2 to increase or decrease the value Step 4 Press the push switch SWP3 to save the change Press SWP3 once within one minute of changing the setting wi...

Page 49: ... SWP1 or SWP2 to save the setting Once the new setting is saved the display will stop blinking and stay lit The display will then return to the item code display mode If SWP3 is not pressed within one minute the change will not be saved and the display will return to the item code display mode Step 5 Turn the power back on Reset the system After changing the settings re initialize the system accor...

Page 50: ...signal is off A will be displayed while the compressor is in operation S will be displayed while the compressor is stopped S will be displayed while the fan is forced to operate will be displayed when this function is disabled d will be displayed when the peak demand control function is enabled will be displayed when this function is disabled Displays the operation mode H will be displayed during ...

Page 51: ...sites may require an installation of an earth leakage breaker for the inverter If no earth leakage breaker is installed there is a danger of electric shock Only use properly rated breakers and fuses Using a fuse or wire of the wrong capacity may cause malfunction or fire Note This device is intended for the connection to a power supply system with a maximum permissible system impedance shown in th...

Page 52: ...ngth of control wiring exceeds 120 m 2 When the wiring length exceeds 10 m use wire of 1 25 mm2 Remote controller cable Size 0 3 1 25 mm Max 200 m total 2 Recommended cable types CVV M NET cable between units 1 Size Min 1 25 mm Max 120 m total Recommended cable types Shielded cable CVVS CPEVS or MVVS External input wire size Min 0 3 mm External output wire size 1 25 mm ...

Page 53: ...ble strap inside the unit indicated as B in the figure to keep it out of contact with the pipes and other components 3 Thread the wiring through the rubber bush indicated as C in the figure second one from the left For details on the opening procedure of A and the wiring of B refer to pages 54 and 55 13 14 15 䐟䐠 0 10 V 10 V GND Connect the flow sensor wiring to the terminal block inside the BOX T...

Page 54: ...ect them 2 Installing the conduit tube Punch out the knockout hole for wire routing at the bottom of the front panel with a hammer When putting wires through knockout holes without protecting them with a conduit tube deburr the holes and protect the wires with protective tape If damage from animals is a concern use a conduit tube to narrow the opening Control terminal block Fix in place with a cab...

Page 55: ...the power cable route the power cable away from the transmission cable distance of at least 50 mm 2 in Top view Wiring Wiring Rubber bushing Rubber bushing oval part Rubber bushing oval part Cut Wiring Cables are coming out of the rubber bushing Top view Cross sectional view Sheet metal on the guard Rubber bushing Sheet metal on the guard Rubber bushing Tie band Overlapped rubber bushing Cut on th...

Page 56: ... blue CN801 yellow CNVOUT CN501 CNS2 CN102 CNIT yellow CNIT red CN04 red yellow CN409 red CN33 3 TB1 ELB1 power supply 3N 50Hz 380 400 415V REMOTE SWS2 SWS1 LOCAL OFF SWP3 SWP2 SWP1 ENTER UP F06 AC250V 3 15A T X02 X03 41 40 63H1 SWU3 SWU1 SWU2 10 10 9 8 7 6 5 4 3 2 1 ON ON ON OFF OFF OFF SW3 SW2 SW1 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 TH11 TH12 TH5 TH1 TH4 TH9 t t t t t t t t TH2 TH3 PSL1 PSH1 ...

Page 57: ...d remote controller wiring and wiring of 100V or greater Do not place them in the same conduit tube or cabtyre cable as this will damage the circuit board F121 H2 Electric heater Antifreeze MP1 Pump motor MVW1 Water flow control valve SV3 SV4 Solenoid valve Defrost 3 Solenoid valve Defrost 4 SV5 Solenoid valve Injection circuit S1 Water flow rate sensor Water flow rate sensor Thermistor of symbol ...

Page 58: ...tion g WATER TEMP SETTING CONTROL Water temperature control can be set by using the external analog input to the CN421 on the circuit board One analog input type can be selected from the following types 4 20 mA 1 5 V 0 10 V or 2 10 V CN421 2 3 h EXTERNAL WATER SENSOR 1 optional TB5 25 26 i EXTERNAL WATER SENSOR 2 optional TB5 27 28 j EXTERNAL WATER SENSOR 3 TB5 27 30 k EXTERNAL WATER SENSOR second...

Page 59: ...l terminal block TB8 No voltage contact output Control terminal block TB5 Optional thermistor Remote controller Control terminal block TB6 No voltage contact input Control terminal block TB4 Optional flow sensor ...

Page 60: ...Measure the circuit resistance and the earth resistance Short circuited circuit or ground fault Resolve the cause and replace the fuse Automatic Start Stop thermistor has tripped Water temperature is high Normal Water temperature is low The setting for the automatic Start Stop thermistor is too low Change the setting for the automatic Start Stop thermistor The unit is in operation but the water do...

Page 61: ...rotection fault Outside temperature is below the minimum usage temperature Sudden frosting or heavy snow has clogged the heat exchanger Low pressure sensor fault Suction refrigerant temperature thermistor fault Electric expansion valve fault on the main circuit Fan motor error broken motor wire Refrigerant shortage gas leakage 1302 High pressure fault Electronic expansion valve fault High pressure...

Page 62: ...H18 Broken or shorted thermistor wiring 5201 High pressure sensor fault high pressure fault Broken or shorted pressure sensor wiring 5202 Low pressure sensor fault low pressure fault Broken or shorted pressure sensor wiring 1102 Discharge temperature fault Water flow control valve fault Pump fault High pressure sensor fault Discharge refrigerant thermistor fault Linear expansion valve fault Main c...

Page 63: ... to swelling 4250 4255 105 Overcurrent error due to a short circuited During operation Inter phase voltage drop Inter phase voltage at or below 180 V Ground fault of the compressor Shorted output wiring 4250 4255 101 Current related prob lems at start up IPM error At startup INV board fault 4250 Fan board fault 4255 Ground fault of the compressor Coil problem IPM error loose terminal screws cracke...

Page 64: ...cooling air passage Power supply voltage drop Inter phase voltage is 180 V or below THHS sensor fault Current sensor fault INV board fan output fault INV circuit fault Compressor fault 5301 5305 115 ACCT sensor fault INV board fault Ground fault of the compressor and IPM error 5301 5305 116 DCCT sensor Poor contact at the INV board connector CNCT Poor contact at the INV board connector DCCT Ground...

Page 65: ...rol board communication circuit fault 6832 Remote controller signal transmission error Communication error due to external noise interference Main control board communication circuit fault 6833 Remote controller over current Remote controller cable is short 6834 Remote controller signal reception error 2 Communication error due to external noise interference Main control board communication circui...

Page 66: ...t your dealer or servicer along with the types of information listed below 1 Model name The model name is a string that starts with QAHV and is found on the lower part of the left side of the unit 2 Serial number Example 75W00001 3 Error code 4 Nature of the problem in detail Example The unit stops approximately one minute after it was started ...

Page 67: ...art up again for up to 10 minutes If the unit does not start when the ON OFF switch is turned on leave the switch turned on for 10 minutes The unit will automatically start up within 10 minutes To stop an operation Switch off the Run Stop switch that controls the unit on the on site control panel or press the ON OFF button on the remote controller 1 1 Refer to the following pages for how to use th...

Page 68: ...will come off and the operation will stop 2 Operation mode and set temperature settings űOperation mode setting Button operation F1 F2 F3 F4 Press the F1 button to go through the operation modes in the order of Mode1 Mode2 and Mode3 Select the desired operation mode Mode1 Mode2 Mode3 űSet temperature setting Button operation F1 F2 F3 F4 Press the F2 button to decrease the set temperature and press...

Page 69: ...ll be displayed Press the F1 button to select a pattern Press the F2 button to select the item you want to change Press the F3 or F4 button to switch to the desired setting Time Set in 5 minute increments Hold down the button to change the value continuously Operation mode Off The options available vary depending on the connected unit If you select an operation mode other than Off the connected un...

Page 70: ... F3 F4 㹼㹼 The suitable periods for the period timer will be displayed To set the period Press the F1 or F2 button to select the specified date and then press the F3 button Move to 3 To set the operation Press the F1 or F2 button to select the specified date and then press the F4 button Move to 4 3 F1 F2 F3 F4 㹼㹼 The period setting screen will be displayed Press the F1 or F2 button to move to the...

Page 71: ...e settings cannot be made with the remote controller After switching to the desired setting press the Select button A setting confirmation screen will appear Navigating through the screens To save the settings Select button To return to the Main display Menu button To return to the previous screen Return button F1 F2 F3 F4 In the Operation setting screen press the F1 button to move the cursor to S...

Page 72: ...nstallation Manual for details You cannot set a time period that spans the Day Start Time Example 1 When the Day Start Time is 22 00 on August 1 and 2 and the time period is 22 00 to 08 00 The shaded Ŷ periods in the figure below indicate when Power Save is used Actual date July 31 Actual date August 1 Actual date August 2 Actual date August 3 0 4 8 12 16 20 0 4 8 12 16 20 0 4 8 12 16 20 0 4 8 12 ...

Page 73: ...ue Control value actually used 12 00 6 30 100 100 100 6 30 7 00 100 60 50 ĺ Because Power Save is set from 7 00 control begins based on the Power Save setting 7 00 11 30 50 60 50 11 30 12 00 50 100 50 While the contact is ON or Power Save is being applied the maximum capacity will be limited to whichever is the lower value of the Power Save and demand control settings While the contact is OFF and ...

Page 74: ...n 1 and 2 overlap only period specified in 1 will be implemented Press the F1 to F4 buttons to set the period and then press the Select button 3 F1 F2 F3 F4 㹼㹼 The Power Save screen will be displayed Press the F4 button 4 F1 F2 F3 F4 㹼㹼㹼㹼㹼 Press the F1 to F4 buttons to set the Power Save start time end time and control value Unit1 FRI Weekly timer Period timer Power Save Unit1 FRI Period Edit...

Page 75: ...ed appropriately such as by writing them down on paper Button operation 1 F1 F2 F3 F4 Select Service from the Main menu and press the Select button 2 F1 F2 F3 F4 A password input screen will be displayed Enter the current maintenance password a 4 digit number After entering the 4 digit password press the Select button If the password is correct the Service menu will be displayed 3 F1 F2 F3 F4 Sele...

Page 76: ...isplayed To continue making settings press the Return button to return to the screen in procedure 3 Use the same procedure to set other connected unit and Data settings Navigating through the screens To return to the Service menu Menu button To return to the previous screen Return button Function setting Item 015 Mode 1 differential value Schedule value 016 Mode 2 differential value Schedule value...

Page 77: ...t button 3 Enter a 3 digit function setting number and press the Select button The setting information send screen appears When the information is sent successfully the function setting values appear in the result display screen To continue operation press the Return button to return to the screen of step 2 Set other M NET address and function setting number using the same procedure Navigating thr...

Page 78: ...ssor operation time 10 h 006 Outlet hot water temperature 0 1ºC Current values 007 Inlet water temperature 0 1ºC 008 High pressure 0 1 MPa 009 Low pressure 0 1 MPa 010 Discharge refrigerant temperature 0 1ºC 011 Suction refrigerant temperature 0 1ºC 012 Operating frequency 0 1 Hz 013 Flow velocity sensor 0 1 L min 016 Secondary side outlet water temperature 0 1ºC 017 Secondary side flow velocity s...

Page 79: ...ain water from the piping Failure to do so may cause the residual water to freeze resulting in damage to the heat exchanger Before using the unit perform a test run such as water fill test or air bleeding test again Drainage method Procedure 1 Disconnect the outlet pipe 2 Disconnect the inlet pipe 3 Open the drain trap at the T shaped part 4 Completely remove water by blowing compressed air or nit...

Page 80: ...mm in 19 05 Rc 3 4 screw pipe External finish Acrylic painted steel sheet Munsell 5Y 8 1 or similar External dimensions H x W x D mm in 1837 1777 not including legs x 1220 x 760 72 3 69 9 not including legs x 48 0 Net weight kg lb 400 882 Design pressure R744 MPa 14 Water MPa 0 5 Heat exchanger Water side Copper tube coil Air side Plate fins and copper tubes Compressor Type Inverter scroll hermeti...

Page 81: ...mode through the dry NC contact Due to continuing improvements specifications may be subject to change without notice Do not use steel pipes as water pipes Keep the water circulated at all times Blow the water out of the pipes if the unit will not be used for an extended period of time Do not use ground water or well water Do not install the unit in an environment where the wet bulb temperature ex...

Page 82: ...EQUENCY Hz RATED INPUT kW RATED CURRENT A RATED VOLTAGE 3N V COP 3 88 17 8 16 9 16 3 10 31 400kg IP24 MODEL QAHV N560YA HPB BS G REFRIGERANT ALLOWABLE PRESSURE Ps WEIGHT YEAR OF MANUFACTURE IP CODE SERIALNo HP 14 0MPa 140 0bar LP 8 5 MPa 85 0 bar Contains fluorinated greenhouse gases covered by the Kyoto Protocol DWG No KC79P648H04 MANUFACTURER MITSUBISHI ELECTRIC CORPORATION AIR CONDITIONING REFR...

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Page 84: ...tromagnetic Compatibility Directive 2014 30 EU Pressure Equipment Directive 2014 68 EU Machinery Directive 2006 42 EC Please be sure to put the contact address telephone number on this manual before handing it to the customer HEAD OFFICE TOKYO BLDG 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Authorized representative in EU MITSUBISHI ELECTRIC EUROPE B V HARMAN HOUSE 1 GEORGE STREET UXBRIDGE M...

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