Mitsubishi Electric CRHV-P600YA-HPB Service Handbook Download Page 148

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[

Troubleshooting ]

- 141 -

HWE1312A

[4] Refrigerant Leak

1. Leak spot: In the case of unit (Heating season)

1)   Collect the refrigerant in the entire system (unit).Do not discharge refrigerant into the atmosphere when it is collected.
2)   Repair the leak.
3)   Repair the leak, and evacuate the air from the entire system

Charge the system with 4.5 kg of R410A.

*1. Refer to Chapter I [5] Vacuum Drying (Evacuation) for detailed procedure. (page 7)

WARNING

Do not use refrigerant other than the type indicated in
the manuals provided with the unit and on the
nameplate.

• Doing so may cause the unit or pipes to burst, or result in

explosion or fire during use, during repair, or at the time of
disposal of the unit.

• It may also be in violation of applicable laws.
• MITSUBISHI ELECTRIC CORPORATION cannot be held

responsible for malfunctions or accidents resulting from the
use of the wrong type of refrigerant.

Summary of Contents for CRHV-P600YA-HPB

Page 1: ......

Page 2: ... wires To reduce the risk of shorting current leakage electric shock malfunctions smoke or fire do 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 burns or frost bites do not touch the refrigerant pipes or refrigerant circuit components with ba...

Page 3: ... so may cause the water to freeze resulting in burst pipes and damage to the unit or the furnishings In areas where temperature drops to freezing use an anti freeze circuit and leave the main power turned on to prevent the water in the water circuit from freezing and damaging the unit or causing water leakage and resultant damage to the furnishings Use clean tap water The use of acidic or alkaline...

Page 4: ...fied refrigerant R410A is present in the refrigerant circuit Infiltration of other substances may cause the pressure to rise abnormally high and cause the pipes to explode To keep the ceiling and floor from getting wet due to condensation properly insulate the pipes Piping work should be performed by the dealer or qualified personnel according to the instructions detailed in the Installation Manua...

Page 5: ...ycling the compressor may damage the compressor To maintain optimum performance and reduce the risk of malfunction keep the air pathway clear To reduce the risk of both the breaker on the product side and the upstream breaker from tripping and causing problems split the power supply system or provide protection coordination between the earth leakage breaker and no fuse breaker When servicing the r...

Page 6: ...efrigerant Circuit 37 2 Control Box of the Unit 39 3 Unit Circuit Board 40 IV Remote Controller 1 Using the Remote Controller 47 2 Function Settings 52 V Electrical Wiring Diagram 1 Electrical Wiring Diagram 57 VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 63 2 Principal Parts and Functions 64 VII Control 1 Functions and Factory Settings of the Dipswitches 69 2 Operating characteristics and...

Page 7: ...CONTENTS HWE1312A GB ...

Page 8: ...ary Tools and Materials 4 3 Brazing 5 4 Air Tightness Test 6 5 Vacuum Drying Evacuation 7 6 Refrigerant Charging 8 7 Remedies to be taken in case of a Refrigerant Leak 8 8 Characteristics of the Conventional and the New Refrigerants 9 9 Notes on Refrigerating Machine Oil 10 ...

Page 9: ... 2 HWE1312A GB ...

Page 10: ...ing of this manual 4 Preparing necessary tools Prepare a set of tools to be used exclusively with each type of refrigerant Refer to Necessary Tools and Materials for information on the use of tools page 4 5 If there is a leak of gaseous refrigerant and the remaining refrigerant is exposed to an open flame a poisonous gas hydrofluoric acid may form Keep workplace well ventilated CAUTION Install new...

Page 11: ...n the high pressure side Charging Hose Evacuation and refrigerant charging Refrigerant Recovery Cylinder Refrigerant recovery Refrigerant Cylinder Refrigerant charging The refrigerant type is indicated The cylinder is Gray Charging Port on the Refrigerant Cylinder Refrigerant charging Tools Materials Use Notes Gas Leak Detector Gas leak detection The ones for use with HFC refrigerant may be used V...

Page 12: ...pper pipes or between a copper pipe and copper coupling If installed refrigerant pipes are not immediately connected to the equipment then braze and seal both ends 2 Reasons The new refrigerating machine oil is 10 times as hygroscopic as the conventional oil and is more likely to cause unit failure if water infiltrates into the system Flux generally contains chloride Residual flux in the refrigera...

Page 13: ... Refrigerant R410A must be charged in its liquid state vs gaseous state 2 Reasons Oxygen if used for an air tightness test poses a risk of explosion Only use nitrogen to check air tightness Refrigerant R410A must be charged in its liquid state If gaseous refrigerant in the cylinder is drawn out first the composition of the remaining refrigerant in the cylinder will change and become unsuitable for...

Page 14: ...egree has not risen by more than 1Torr 130Pa 1hour after evacuation A rise by less than 1Torr 130Pa is acceptable If the vacuum is lost by more than 1Torr 130Pa conduct evacuation following the instructions in section 6 Special vacuum drying 5 Procedures for stopping vacuum pump To prevent the reverse flow of vacuum pump oil open the relief valve on the vacuum pump side or draw in air by loosening...

Page 15: ...e use 7 Remedies to be taken in case of a Refrigerant Leak If the refrigerant leaks out all of the remaining refrigerant must be replaced with a new charge to maintain the proper composition of the refrigerant Repair the leak and then charge the system with the specified amount of refrigerant 4 5 kg Charge refrigerant in the liquid state Refer to IX 4 Refrigerant Leak page 141 Cylinder with a siph...

Page 16: ...ion wt 50 50 23 25 52 100 Type of Refrigerant Pseudo azeotropic Refrigerant Non azeotropic Refrigerant Single Refrigerant Chloride Not included Not included Included Safety Class A1 A1 A1 A1 A1 Molecular Weight 72 6 86 2 86 5 Boiling Point C F 51 4 60 5 43 6 46 4 40 8 41 4 Steam Pressure 25 C MPa 77 F psi gauge 1 557 226 0 9177 133 0 94 136 Saturated Steam Density 25 C kg m3 77 F psi 64 0 42 5 44 ...

Page 17: ...nants is defined as moisture air processing oil dust dirt wrong types of refrigerant and refrigerating machine oil Cause Symptoms Effects on the refrigerant cycle Water infiltration Frozen expansion valve and capillary tubes Clogged expansion valve and capillary tubes Poor cooling performance Compressor overheat Motor insulation failure Burnt motor Coppering of the orbiting scroll Lock Burn in on ...

Page 18: ...Configuration 13 2 Types and Maximum allowable Length of Cables 14 3 Main Power Supply Wiring and Switch Capacity 15 4 Sample Installation 18 5 Switch Types and the Factory Settings 19 6 Configuring the Settings 20 7 Water Pipe Installation 27 ...

Page 19: ... 12 HWE1312A GB ...

Page 20: ...CB SUB PCB External temperature sensor Field supplied dry contact switch relay or remote controller PAR W21MAA Field supplied dry contact switch relay or remote controller PAR W21MAA External temperature sensor MAIN PCB SUB PCB Each unit is operated individually by connecting a dry contact switch relay to each unit External temperature sensor Field supplied dry contact switch relay or remote contr...

Page 21: ...e for each refrigerant system Do not use a single multiple core cable to connect units that belong to different refrigerant systems The use of a multiple core cable may result in signal transmission errors and malfunc tions 2 Control wiring Different types of control wiring are used for different systems Types and maximum allowable length of cables Control lines are categorized into 2 types transm...

Page 22: ...llation 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 sho...

Page 23: ... When connecting the cables first temporarily fasten the cables and then fasten them properly after the cables have been connected to the terminal blocks within the control box 2 Precautions when fastening screws Faulty contacts due to loose screws may cause overheating and fire Using the circuit board while it is damaged may cause overheating and fire 1 Screw fastening torque Use the following me...

Page 24: ...nnectable to the power supply terminal block TB2 Use a pull box to connect them 3 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 tu...

Page 25: ...relay or remote controller PAR W21MAA External temperature sensor MAIN PCB SUB PCB Each unit is operated individually by connecting a dry contact switch relay to each unit External temperature sensor Field supplied dry contact switch relay or remote controller PAR W21MAA MAIN unit SUB unit SUB unit s n units Inter unit wiring M NET line A group of unit that consists of one main unit and up to 15 s...

Page 26: ... action that the switch takes when set to a certain position depends on the type of system configuration e g individual or multiple system REMOTE REMOTE Slide switch SWS2 Unused A A Push switch SWP1 Switches the display between the item code and the current value for a specific item Increases value Push switch SWP2 Switches the display between the item code and the current value for a specific ite...

Page 27: ...g value is 60 0 To decrease this value to 58 0 for example press SWP2 Press SWP1 to increase the value 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 ...

Page 28: ...g n i t t e s e l u d e h c s e l b a s i d e l b a n E ON time 1 schedule mode without remote 6 0 00 OFF time 1 schedule mode without remote 7 0 00 ON time 2 schedule mode without remote 8 0 00 OFF time 2 schedule mode without remote 9 0 00 ON time 3 schedule mode without remote 18 0 00 OFF time 3 schedule mode without remote 19 0 00 0 0 3 1 e m i t t n e r r u C 1 0 3 1 g n i t t e s e t a D h t...

Page 29: ...right 3 Set the preset values with the switches on the MAIN circuit board 1 Press either one of the push switches SWP1 2 or 3 labeled A in the figure at right on the MAIN circuit board EEEE will disappear and an item code 101 will appear on LED1 labeled B in the figure at right 2 Use SWP3 to toggle through the item codes and select an item code to change its current value The item codes will appea...

Page 30: ...gram Setting the switches on the main unit MAIN circuit 1 Set the dip switch SW2 8 to ON an external water temperature sensor labeled A in the figure at right 2 Set the dip switch SW2 9 to ON multiple unit control labeled A in the figure at right SUB circuit Nothing needs to be changed Refer to Dip switch settings table page 69 for further details Make sure the address of the MAIN circuit on the m...

Page 31: ...cuit board on the main unit and both MAIN and SUB circuits on the sub units 3 Set the preset values with the switches on the MAIN circuit board 1 Press either one of the push switches SWP1 2 or 3 labeled A in the figure at right on the MAIN circuit board EEEE will disappear and an item code 101 will appear on LED1 labeled B in the figure at right 2 Use SWP3 to toggle through the item codes and sel...

Page 32: ... is starting up 9999 will appear on LED1 labeled B in the figure at right When start up is complete a control property 0002 will appear Then five seconds later FFFF will appear 3 Set the rotary switch SWU3 labeled A in the figure at right back to 0 The start up process is complete and the settings for such items as clock peak demand control schedule and thermistor settings can now be made 1 If the...

Page 33: ...ar Then five seconds later FFFF will appear 3 Press and hold the push switch SWP3 again for one second or longer While the system is starting up 9999 will appear on LED1 When start up is complete a control property 0002 will appear Then five seconds later FFFF will appear 4 Set the rotary switch SWU3 back to 0 5 Resetting the system MAIN and SUB circuits Take the following steps to reset the syste...

Page 34: ...Install air venting valves to the places where air can accumulate Automatic air vent valves such as are effective Expansion tank Install an expansion tank to accommodate expanded water and to supply water Closed expansion tank Use a closed expansion tank to help manage the concentration of brine n o i t a l u s n i e t a u q e d a e d i v o r p d n a g n i g r u p r i a y s a e r o f w o l l a t a...

Page 35: ...rine quality management To protect the heat exchanger from freezing use the ethyleneglycol 35wt Always use organic brine for this unit and maintain brine s freezing temperature below 18 C KC79M182H01 To protect the heat exchanger from corrosion the makeup water and the circulating water need to meet the Water Quality Standards below Water quality management Including water used for brine Not to be...

Page 36: ...ut the tape equivalent to the length sufficient to wrap around the coupling screws three times 2 Attach the end of the sealing tape to the coupling screws hold it with a finger and wrap the sealing tape around the coupling screws gradually turning the screwdriver to unwrap the tape from the screwdriver To reduce the risk of injury from metal sheet edges wear protective gloves The unit and water pi...

Page 37: ...has been no signs of corrosion If the water quality level has dropped adjust the water quality before replacing the unit Brine Quality Control To protect the heat exchanger from freezing use the ethylene glycol 35 wt Always use organic brine for this unit and maintain brine s freezing temperature below 18 Items Lower mid range temperature water system Water Temp 60ºC Higher mid range temperature w...

Page 38: ...h a bypass strainer 6 Connecting pipes made from different materials If different types of metals are placed in direct contact with each other the contact surface will corrode Install an insulating material between pipes that are made of different materials to keep them out of direct contact with each other 7 Piping material Use hot water output piping material that can withstand heat of 70 C or m...

Page 39: ...cifications on the heat source fluid pipe Connect the flow switch to the flow switch contact on the unit Minimum flow rate 2 0 m h 33 3 L min Unit usage range water flow rate 2 0 16 0 m h When using brine as heat source fluid When using water as heat source fluid Rc2 195 1 4 3 123 Y shaped strainer Pipe field supplied Min 150 Sample installation Unit mm Option Parts YS 50A Recommended torque 200 2...

Page 40: ...ws the minimum allowable amount of water in the water circuit If the piping length is too short to secure this amount install a cushion tank to ensure that the circuit has enough water in it 2 Calculating the amount of water in the circuit The amount of water in the circuit can be obtained using the following formula Amount of water in the water circuit Amount of water in the water piping Amount o...

Page 41: ... II Restrictions 34 HWE1312A GB ...

Page 42: ... 35 HWE1312A GB III Unit Components 1 Unit Components and Refrigerant Circuit 37 2 Control Box of the Unit 39 3 Unit Circuit Board 40 ...

Page 43: ... 36 HWE1312A GB ...

Page 44: ...A GB III Unit Components 1 Unit Components and Refrigerant Circuit 1 Unit Components Panel T Panel assy L Panel assy FU Panel assy FB H screw Fan Fan Fan Panel BU PIPE 2 Panel BU PIPE Panel BU Panel assy BB PIPE Panel assy BB Panel R ...

Page 45: ... SUB Thermistor TH20 Thermistor TH1 Thermistor TH5 Thermistor TH6 Thermistor TH17 Thermistor TH11 Thermistor TH18 Thermistor TH12 Thermistor TH8 Thermistor TH4 Thermistor TH7 Thermistor TH3 Solenoid valve Solenoid coil SUB Solenoid valve Solenoid coil MAIN Linear expansion valve MAIN Linear expansion valve SUB SUB Check joint HP SUB Check joint HP MAIN Check joint LP MAIN Check joint LP SUB Strain...

Page 46: ...onents 2 Faston terminals have a locking function Make sure the cable heads are securely locked in place Press the tab on the ter minals to remove them Control board DC reactor DCL Electromagnetic relay 52C Noise filter Note 1 INV board Capacitor Rush current protection resister Terminal block TB1 Control terminal block 1 TB5 Control terminal block 2 TB6 Control terminal block 3 TB8 Control board ...

Page 47: ...put CNAC 200 VAC input R S F06 Fuse 250V 3 15A LED2 Lit during normal CPU operation CNIT Output 12VDC GND Output 5VDC RX Power supply detection input TX Power supply ON OFF signal output Transmission line input output for centralized control system Internal transmission line input output 30VDC CN62 LEV driving output CN3A Remote controller Sensor input LED1 Digital display Dip switch Dip switch SW...

Page 48: ...lized control system CNIT 12VDC input GND 5VDC input Power supply detection output Power supply ON OFF signal input LED1 Power supply for indoor transmission line TP1 2 Check pins for outdoor transmission line TB7 Terminal block for transmission line for centralized control TB3 outdoor transmission block Ground terminal for transmission line Grounding Grounding CN04 Bus voltage input P N Grounding...

Page 49: ...rminal P Note Bus voltage check terminal N Note 1 SC P2 Bus voltage Input P SC P1 Rectifier diode output P LED1 Lit Inverter in normal operation Blink Inverter error CN6 Open No load operation setting Short circuited Normal setting CN5V GND 5VDC output RSH1 Overcurrent detection resistor CN43 GND Control Board Serial communication signal output CN2 Serial communication signal output GND 17VDC inpu...

Page 50: ... CN5 Output Rectified L2 N current P N TB21 Input output L1 TB22 Input output L2 TB23 Input output L3 TB24 Input N CN1B Input L3 L2 CN1A Input N L1 Grounding F1 F2 F3 F4 Fuse 250VAC 6 3A CN3 Output L1 N Grounding CN2 Surge absorber circuit Surge absorber circuit Short circuit Short circuit ...

Page 51: ... III Unit Components 44 HWE1312A GB ...

Page 52: ... 45 HWE1312A GB IV Remote Controller 1 Using the Remote Controller 47 2 Function Settings 52 ...

Page 53: ... 46 HWE1312A GB ...

Page 54: ...on press the Mode BACK button until the desired mode appears Each press changes the operation mode in the following sequence see notes 1 and 2 below Heating Heating ECO Hot water Anti freeze Back to Heating The currently selected mode will appear in the area labeled 1 If CN142A 3 4 is ON CLOSE the operation mode cannot be changed from the remote controller 2 The available modes vary depending on t...

Page 55: ...labeled 2 Press the TIMER ON OFF SET DAY button to set the day labeled in the figure Each press advances the day 3 Press the Set Time button as necessary to set the time When the button is held down the time at will increment first in one minute intervals then in ten minute intervals and then in one hour intervals 4 After making the appropriate settings in Steps 2 and 3 press the CIR WATER button ...

Page 56: ...cedure and return to the Normal Operation screen 12 To activate the timer press the TIMER ON OFF button so that the Timer Off icon disappears If no timer settings have been made the Timer Off icon will flash on the screen How to View the Weekly Timer Settings 1 Make sure that WEEKLY is displayed 2 Press the TIMER MENU button so that Monitor appears on the screen 3 Press the TIMER ON OFF SET DAY bu...

Page 57: ...Viewing the Current Simple Timer Settings 1 Make sure that SIMPLE is displayed 2 Press the TIMER MENU button so that Monitor appears on the screen If the ON or OFF simple timer is running the current timer value will appear in the area labeled If ON and OFF values have both been set the two values will appear alternately 3 Press the Mode BACK button to close the monitor display and return to the N...

Page 58: ... pressed 5 Press the Mode BACK button to complete the setting procedure and return to the Normal Operation screen 6 If the unit is already running the timer will start counting down immediately Make sure that the remaining time is displayed on the screen and that it is correct Checking the Current Auto Off Timer Setting 1 Make sure that AUTO OFF is displayed 2 Press and hold the TIMER MENU button ...

Page 59: ... temperature unit C or F 2 Water temperature display setting WATER TEMP DISP SELECT Use to show or hide the water temperature PAR W21MAA ON OFF TEMP MENU BACK DAY CHECK TEST MONITOR SET CLOCK CLEAR ON OFF INITIAL SETTING CIR WATER Normal Operation screen Screen that appears when the unit is not running Press and hold the and buttons for two seconds No settings can be changed during a test run and ...

Page 60: ... ON OFF button to toggle through the following options Setting the contact number To set the contact number follow the following procedures Press the TEMP or button to move the cursor to the right left Press the CLOCK or button to set the contact number 5 Temp offset setting Press the ON OFF button to toggle between the following options 4 4 Display options 1 Temperature unit C F setting Press the...

Page 61: ... IV Remote Controller 54 HWE1312A GB ...

Page 62: ... 55 HWE1312A GB V Electrical Wiring Diagram 1 Electrical Wiring Diagram 57 ...

Page 63: ... 56 HWE1312A GB ...

Page 64: ...ck heat source 3 RA RB Normal Error Control power circuit Suction Ref temp 1 Motor Compressor Discharge Ref temp 1 L2 L2 L3 28 L1 L1 Heating Eco Heating Mode Heat source change1 CNLVA blue SW421 TB5 3 1 2 29 CNTYP1 black Z21 Control Board Run ON OFF TB6 TB6 TB6 Anti freeze TB5 TB8 Capacity mode TH3 Shell Ref temp 1 TH11 Water inlet temp 1 6 Pump operation command output 5 power supply 3N 50Hz 380 ...

Page 65: ... N LED2 CPU in operation 1 2 3 4 CN52C red 52C 1 2 CN63HS 3 Water outlet temp 2 2 2 F M 1 2 F M 7 MS 3 U LED1 LED3 Lit while energized W black CNAC2 V 0 ENTER 1 SWP2 Unit address setting 1 SWP3 5 1 SWU1 3 UP 1 1 SWP1 SWU2 1 DOWN SWU3 B A OFF LOCAL SWS1 1 SWS2 F06 AC250V 3 15A T 2 2 10 digit 1 digit C100 TB4 3 2 4 2 2 2 red t X04 X05 LEV1 2 CNLVC 1 2 3 t t t t 63H2 CNAC red 1 2 REMOTE 63LS L3 63HS ...

Page 66: ...er wiring b No voltage contact input wiring c No voltage contact output wiring d Remote water temperature setting 1 The broken lines indicate the optional parts field supplied parts and field work 2 Make sure to connect a pump interlock contact A short circuit may cause abnormal stop or malfunctions 3 The preset temperature setting can be switched from the no voltage contact or by setting time ran...

Page 67: ... V Electrical Wiring Diagram 60 HWE1312A GB ...

Page 68: ... 61 HWE1312A GB VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 63 2 Principal Parts and Functions 64 ...

Page 69: ... 62 HWE1312A GB ...

Page 70: ...t heat source temperature sensor 1 Outlet hot water temperature sensor Compressor discharge temperature sensor Compressor suction temperature sensor TH18 TH12 TH13 Outlet heat source temperature sensor 1 1 Under the standard pipe connection of the heat source Counter flow TH14 TH20 TH5 TH1 TH6 TH2 TH8 TH4 TH7 TH3 Component Symbol SUB circuit MAIN circuit Compressor Parallel flow Counter flow Compr...

Page 71: ...ides high pressure protection 4 15MPa OFF setting Thermi stor TH1 5 Discharge 1 Detects discharge tem perature 2 Provides high pressure protection Degrees Celsius Resistance check 0 C 32 F 698kohm 10 C 50 F 413kohm 20 C 68 F 250kohm 30 C 86 F 160kohm 40 C 104 F 104kohm 50 C 122 F 70kohm 60 C 140 F 48kohm 70 C 158 F 34kohm 80 C 176 F 24kohm 90 C 194 F 17 5kohm 100 C 212 F 13 0kohm 110 C 230 F 9 8ko...

Page 72: ...0V Open while being powered closed while not being pow ered Continuity check with a tester Heater CH Heats the refrigerant in the compressor Cord heater 240V 35W Resistance check Fan motor FAN motor Cools the heatsink and ex hausts air from the unit AC230V Linear expan sion valve LEV2 INJ control Adjusts the amount of bypass flow from the liquid pipe on the outdoor unit during heating DC12V Openin...

Page 73: ... VI Refrigerant Circuit 66 HWE1312A GB ...

Page 74: ... 67 HWE1312A GB VII Control 1 Functions and Factory Settings of the Dipswitches 69 2 Operating characteristics and Control Capabilities 87 ...

Page 75: ... 68 HWE1312A GB ...

Page 76: ... 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 OFF Changes the 7 segment LED display mode Any time SW3 1 Remote reset Enables or disables the error to be reset from a remote location ON Disables the error to...

Page 77: ...put signal of the MAIN circuit REMOTE Unit Operation SWS1 Setting Main unit MAIN circuit Sub unit MAIN circuit Main unit MAIN circuit Main unit SUB circuit Sub unit MAIN circuit Sub unit SUB circuit LOCAL LOCAL Follows the input signal of the MAIN circuit on the Main unit Follows the input signal of the MAIN circuit on the Main unit Follows the input signal of the MAIN circuit on the Sub unit Foll...

Page 78: ...controller Manual setting Schedule setting SW2 7 ON Ineffective Ineffective Ineffective Ineffective Ineffective Temperature setting for the analog signal input TH15 SW2 7 OFF When schedule has been set Ineffective Ineffective Ineffective Ineffective Selectable from temperature settings A through C Selectable from TH15 or TH16 When no schedule has been set ON Heating Eco ON Hot water Ineffective In...

Page 79: ... VII Control 72 HWE1312A GB Water temperature setting Different water temperature settings can be set for different modes Use item codes 11 13 22 23 24 25 26 or 27 to set the water temperatures ...

Page 80: ...ems that can be set Item code Initial value Unit Setting Setting change from an optional remote controller PAR W21MAA Increments Lower limit Upper limit Water temp setting A Heating mode 11 35 C 0 1 C 30 65 Possible Water temp setting B 1 Hot water mode 13 55 C 0 1 C 30 65 Possible Heating ECO mode Water temp setting C1 2 22 60 C 0 1 C 30 65 Not possible Heating ECO mode Outside temp setting C2 2 ...

Page 81: ...he 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 Water temp Water temp setting C3 Water temp setting C1 Outsidetemp setting C4 Outside temp setting C2 Outside temp Always use a value for setting C6 that is between setting value C2 and setting value C4 and for setting C5 between setting value C1...

Page 82: ...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 will not be saved and the display will return to the item code display mode SW2 SW3...

Page 83: ...peration periods 2 and 3 overlap Refer to the section on how to select the preset water temperatures on the next page Operation Period 1 Operation Period 2 Operation Period 3 Target water temp Operation command signal Operation Period 1 Operation Period 2 Operation Period 3 Set temp Operation command signal Operation Period 1 Operation Period 2 Operation Period 3 Set temp Operation command signal ...

Page 84: ...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 will not be saved and the display will return to the item code display mode SW2 SW3 10 5...

Page 85: ...ode 1220 Operation time setting 3 Item code 1217 Preset temp 3 Item codes 22 27 Heating ECO Example 1 Example 2 Example 3 1 2 Start time 1 End time 1 Operation 1 Preset temperature is selectable from A B or C Heating Heating Hot Water 3 4 Start time 2 End time 2 Operation 2 Preset temperature is selectable from A B or C Hot Water Hot Water Heating ECO 5 6 Start time 3 End time 3 Operation 2 Preset...

Page 86: ...ep 2 Select the desired item 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 minut...

Page 87: ...tep 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 return to the item code display mode If SWP3 is not pressed within one minute ...

Page 88: ... will be displayed when the individual system control option is used 1 The dot lights up when the operation signal is on The dot lights off when the operation 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 disp...

Page 89: ...s are saved the values will blink Press SWP3 once within one minute 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...

Page 90: ...e 11 External analog input signal of 5 V Preset temp B Item code 13 External analog input signal of between 1 5 and 4 5 V the preset temperature will be linearly interpolated When the water temperature setting input signal type is set to 3 2 10 V External analog input signal of 2 V Preset temp A Item code 11 External analog input signal of 10 V Preset temp B Item code 13 External analog input sign...

Page 91: ... will be linearly interpolated When the water temperature setting input signal type is set to 2 1 5 V External analog input signal of 1 1 5 V 0 External analog input signal of 4 5 5 V 100 External analog input signal of between 1 5 and 4 5 V the percent will be linearly interpolated When the water temperature setting input signal type is set to 3 2 10 V External analog input signal of 2 3 V 0 Exte...

Page 92: ... water temperature Average value between the water temperature settings of the MAIN and SUB circuits Setting procedures Set the dip switches on the circuit board as follows to change the settings 1 Water temperature control option is set to OFF the water temperature drops below TWL1 and the outside temperature drops below TAL1 2 Water temperature control option is set to ON the external water temp...

Page 93: ...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 2 Select the item to be set with push switch SWP3 Step 3 Change the values with push switches SWP1 or SWP2 Items that can be set Item code Initial value Unit Setting Note Setting ch...

Page 94: ... gas temperature of 120ºC or above was detected the unit will make an abnormal stop Heat source HEX wall temp Hex protection TH4 TH8 Heat source HEX wall temp OFF ºC A heat source HEX wall temperature of 17 5ºC was detected Suction temp vacuum and freeze up protec tion TH2 TH6 Suction gas temp OFF ºC A suction gas temperature of 36ºC was detected Compressor shell temp compressor floodback protec t...

Page 95: ...ncy fluctuation will be kept within 10 Hz The above does not apply when the high pressure is suppressed to protect the system or when the defrost operation is in progress The amount of frequency change is controlled to approximate the target value that are determined based on the temperature difference between the current and the preset water temperatures The minimum operating frequency is 30 Hz T...

Page 96: ... LEV opening will be controlled every 30 seconds to approximate the dis charge SH to the target value according to the changes in high pressure and discharge gas temperature Refer to the table below for the target discharge SH values Target discharge SH Item code c31 Discharge gas temp discharge pressure saturation temperature Refer to Chapter IX 1 2 Checking the sensor status Outlet water tem per...

Page 97: ... will be maintained Refrigerant Recovery Control 6 Operation during power failure Duration of power failure 20 ms or shorter 20 200ms 200 ms or longer Detection of power failure Undetectable Instantaneouspower failure Detection of power failure Operation during power failure Normal operation During an instanta neous power failure the unit will be con trolled according to the input status of the ci...

Page 98: ...delay function to protect the compressor from short cycling This function is effec tive even after a power failure Compressor ON OFF Time Min 3 minutes 3 minute restart delay function The 3 minite restart delay function will be triggered in the following situations 1 The setting for the SWS1 Local Off Remote was changed or 2 after a power failure Min 10 minutes 15 minutes 10 minutes Compressor ON ...

Page 99: ...mum capacity setting D 70 All units will be operated at D Hz 320 No 1 unit No 2 unit No 3 unit No 4 unit 80 100 400 100 Entire system No 1 unit No 2 unit No 3 unit No 4 unit No 1 unit No 2 unit No 3 unit No 4 unit Entire system Distribution of capacity The maximum capacity of each unit is set as 100 The figures in the angle brackets indicate the total capacity in the entire system b Maximum capaci...

Page 100: ...ater temperature meets the following formula External water temperature Set temperature Tshs DIFF 2 value divided by 2 If two or more units are operating at the same frequency the one with more hours of cumulative operation hours will be stopped first 2 One unit will go into operation when the external water temperature meets the following formula External water temperature Set temperature Tshs DI...

Page 101: ...ame as left Heat source side Pump start conditions Heat source temperature is more than 1ºC of 8 ºC Same as left Pump stop conditions Heat source temperature is more than 1ºC of 6 ºC Same as left CN52C red TB6 TB8 PL2 Operation display output Pump error heat source Error display output 52P2 MP2 M 3 52P2 52P2 77 76 75 74 73 72 N No voltage contact output Pump operation command output hot water 71 C...

Page 102: ...ue DIFF2 2 ºC Initial setting 1016 Digitally set value Tmax 67 ºC Switch Factory setting Outlet water temperature based control SW3 3 OFF Inlet water temperature based control Water temperature control based on the external water temperature reading SW2 8 OFF SW3 3 SW2 8 Outlet water temperature based control OFF OFF Inlet water temperature based control ON OFF Water temperature control based on t...

Page 103: ...greater than the set temperature DIFF2 value ºC AND at least 60 seconds have passed since the last Thermo ON Multiple system Representative water temperature Water temperature control based on the external water tem perature reading External water temperature thermistor reading Set tem perature DIFF 2 value ºC AND the anti short cycling pro tection function is not been trig gered The number of uni...

Page 104: ... Refer to the section on indi vidual system Built in thermistor External water temperature Inlet water temperature based control Outlet water temperature based control Water tem perature con trol based on the external water temper ature reading When SW2 5 operation restora tion after forced stoppage is set to ON Inlet water temperatures are lower than the Inlet temperature at Thermo OFF DIFF2ºC AN...

Page 105: ...ied reset the unit according to the instructions in 6 4 Re initializing the system page 26 A separately sold water temperature sensor TW TH16 will be required to control the water temperature based on the exter nal water temperature reading It is possible to switch between two external water temperature sensors Refer to the installation manual for how to set the sensors Install the external water ...

Page 106: ...nal block in the control box on the unit Unit 50 48 T2 T1 A B constant 3460K R 1 2 Sensor Sensor properties Resistance R 15KΩ 3 0 C Terminal block for connection to the sensor M4 screws 3 Terminal screws A B B Note Run the sensor wiring at least 5 cm away from any wire that carries a voltage of 100 V or more and do not put the sensor wiring in the same conduit tube with it ø 7 8 54 42 157 20 12 ø1...

Page 107: ... VII Control 100 HWE1312A GB ...

Page 108: ... Test Run Mode 1 Items to be checked before a Test Run 103 2 Test Run Method 105 3 Operating the Unit 106 4 Refrigerant 108 5 Symptoms that do not Signify Problems 108 6 Standard operating characteristics Reference data 108 ...

Page 109: ... 102 HWE1312A GB ...

Page 110: ...d and the load side voltage of the solenoid contactor in the relay box during operation are within the voltage ranges Check the voltage in all phases L1 L2 and L3 and make sure that the voltage imbalance between the phases is 2 or less 8 Check either the power supply current or the compressor current Check the compressor current in all phases L1 L2 and L3 9 Check for proper circulating water flow ...

Page 111: ...it Terminal block and The unit will not operate unless this circuit is complete 2 Notes on connecting the pump interlock wire Connect an NO relay solenoid switch for the pump This circuit is a low voltage circuit Keep the pump interlock wire at least 5 cm away from any wire that carries a voltage of 100 V or above to avoid damage to the circuit board 12 Checking the rotation direction of the pump ...

Page 112: ...tton Not available CIR WATER button Enter button INITIAL SETTING button Down Up buttons ON OFF button Opening the lid Operation procedures PLEASE WAIT appears on the LCD for up to five minutes Turn on the main power Set the water temperature to a temperature at least 5 ºC above the current settings Note 1 Refer to the following pages if an error code appears on the remote controller or when the un...

Page 113: ...If using water as heat source cut CN142D 1 3 short circuit wire After cutting CN142D 1 3 the power reset function is enabled To prevent the heat exchanger from freezing make sure to check that the CN142D1 3 is cut if using water as heat source Heat source fluid Brine Brine Water 2 Water 2 Below 18 C freezing temp 1 freezing temp 1 Below 18 C Heat source fluid inlet Upper Side Lower Side Lower Side...

Page 114: ...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 Refer to the following pages for how to use the remote controller IMPORTANT Keep the main power turned on throughout the operating season in which the unit is stopped for three days or shorter e g duri...

Page 115: ... 3 Inlet hot water temperature C 30 30 Outlet hot water temperature C 35 35 Pressure High pressure MPa 2 05 2 05 Low pressure MPa 0 57 0 51 Compressor Frequency Hz 82 82 Unit type CRHV P600YA HPB Refrigerant type R410A Refrigerant charge 4 5kg 2 Cause Remote controller display Symptom The display shown right will appear on the unit remote controller for about 5 minutes when the main power source i...

Page 116: ... 109 HWE1312A GB IX Troubleshooting 1 Maintenance items 111 2 Troubleshooting 119 3 Troubleshooting Principal Parts 125 4 Refrigerant Leak 141 5 Parts Replacement Procedures 142 ...

Page 117: ... 110 HWE1312A GB ...

Page 118: ... 6 7 8 9 10 OFF OFF OFF OFF OFF ON ON Step 2 Select the desired item with the push switch SWP3 Press the push switch SWP3 to toggle through the item codes listed below Select an item code from 1 through 18 and press either of the push switches SWP1 or SWP2 to display the error history error code in blinking form Step 3 Press the push switches SWP1 or SWP2 to increase or decrease the value Refer to...

Page 119: ...econd decimal place Low pressure 1 LP1 Low pressure 2 LP2 c13 Heatsink temperature THHS c14 First decimal place Water temperature setting using an external analog input 4 20 mA Current input c15 First decimal place I u U phase current Compressor c16 First decimal place I w W phase current Compressor c17 First decimal place I dc Bus current Compressor c18 First decimal place Vdc Bus voltage Compres...

Page 120: ...he push switch SWP3 to toggle through the item codes listed below Select an item code from c01 through c36 and press either of the push switches SWP1 or SWP2 to display the current temperature pressure and electrical current in blinking form Step 3 Press the push switches SWP1 or SWP2 to increase or decrease the value Refer to Sensors and item code list for the types of errors that appear on error...

Page 121: ...t decimal place Note4 I w W phase current Compressor c17 First decimal place Note4 I dc Bus current Compressor c18 First decimal place Note4 Vdc Bus voltage Compressor c19 Integer Note5 Suction SH target c24 First decimal place Note6 Compressor frequency actual frequency c25 Integer Note7 Suction SH c26 First decimal place Note8 Shell bottom SH c27 First decimal place Note9 Opening of the LEV on t...

Page 122: ...before error occur rence time and data type They will appear alternately at one second intervals Every time SWP2 is pressed the time will go back by one minute and the time and the temperature or pressure will appear alternately at one second intervals Each time SWP1 is pressed the time will advance by one minute and the time and the temperature or pressure will appear alternately at one second in...

Page 123: ...ecimal place Fixed to 0 Fixed to 0 Fixed to 0 Representative water temperature 2 TH16 c11 First decimal place Second decimal place Second decimal place Fixed to 0 Fixed to 0 Fixed to 0 High pressure 1 HP1 High pressure 2 HP2 c12 Low pressure 1 LP1 Low pressure 2 LP2 c13 Heatsink temperature THHS c14 First decimal place c15 First decimal place Note3 Note4 Fixed to 0 Fixed to 0 Fixed to 0 I u U phas...

Page 124: ...ch SWP3 to toggle through the item codes listed below Press the push switches SWP2 and SWP3 to change the value of the selected item Step 3 Press the push switches SWP1 or SWP2 to increase or decrease the value Refer to Maintenance item 1 list on the next page for information about the items that can be set Step 4 Press the push switch SWP3 to save the change Press SWP3 once within one minute of c...

Page 125: ...emperature thermistor while the Temperature shift Setting temperature B function is enabled Representative water temperature thermistor while the Temperature shift Setting temperature A function is enabled 1216 1 14 15 14 Note10 Representative water temperature thermistor while the Temperature shift Setting temperature C function is enabled 1217 1 14 15 14 Note11 Note1 Do not use this item Stop th...

Page 126: ... discharge temperature thermistor has tripped 1102 LEV fault in the main circuit Replace the LEV in the main circuit Injection LEV fault Replace the injection LEV Injection solenoid valve fault Replace the solenoid valve Refrigerant gas leakage Leakage test Refrigerant undercharge Repair the cause of refrigerant shortage evacuate the system and charge the refrig erant circuit with refrigerant A th...

Page 127: ...ce the strainer High pressure is too high Check the items above and make neces sary adjustments so that the suction gas temperature falls within the specified tem perature range The unit has stopped during operation and does not restart Overcurrent passed through the compressor 4250 Heat source tempera ture is high Overload operation Burnt motor Seized compressor Reduce the operation load and chec...

Page 128: ...t d e t r o h s r o n e k o r B 9 H T e r u t a r e p m e t e d i s t u O 5111 5117 Inlet water temperature TH11 MAIN Circuit Inlet water temperature TH17 SUB Circuit Broken or shorted thermistor wiring 5112 5118 Outlet water temperature TH12 MAIN Circuit Outlet water temperature TH18 SUB Circuit Broken or shorted thermistor wiring 5113 g n i r i w r o t s i m r e h t d e t r o h s r o n e k o r B...

Page 129: ... swelling Items listed under Heatsink overheat protection below 4250 102 t l u a f d r a o b V N I t n e r r u c r e v o T C C A Ground fault of the compressor Coil problem IPM error loose terminal screws cracked due to swelling 4250 103 DCCT overcurrent 4250 107 Overcurrent relay trip effective value During operation 4250 106 Overcurrent relay trip momentary value During operation 4250 104 Short ...

Page 130: ... contact at the INV board connector CNCT2 ACCT ACCT sensor fault 5301 118 o c r o o P t l u a f t i u c r i c r o s n e s T C C D ntact at the INV board connector CNCT Poor contact at the INV board connector DCCT DCCT sensor fault INV board fault 5301 119 Open circuited IPM loose ACCT sensor Disconnected ACCT sensor CNCT2 ACCT sensor fault Broken compressor wiring INV circuit fault IPM error etc 5...

Page 131: ... recovery after power failure setting is Enable 6 Before resetting this error remove its causes Resuming operation without removing the causes of heat exchanger freeze up w 7 Under the standard pipe connection of the heat source Counter flow ill cause heat exchanger damage 7105 Multiple system error r o r r e g n i t t e s s s e r d d A r o r r e g n i t t e s s s e r d d A Non consecutive address...

Page 132: ...ssure on the self diagnosis LED1 1 When the pressure displayed on self diagnosis LED1 is between 0 and 0 098MPa the high pressure sensor has a problem 2 When the pressure displayed on self diagnosis LED1 is approximately 4 15MPa the control board has a problem 4 Remove the high pressure sensor from the control board and short circuit between the No 2 and 3 connectors 63HS CN63HS to check the press...

Page 133: ... a problem When the outdoor temperature is 40 C or less the control board has a problem When the outdoor temperature exceeds 40 C go to 5 4 Remove the low pressure sensor from the control board and short circuit between the No 2 and 3 connectors 63LS CN63LS to check the pressure with the self diagnosis LED1 1 When the pressure displayed on the self diagnosis LED1 exceeds 1 7MPa the low pressure se...

Page 134: ...d their corresponding connectors Check each sensor by disconnecting the corresponding connector TH1 TH5 CN401 TH3 TH7 CN402 3 4 TH2 TH6 CN402 1 2 1 2 TH4 TH8 CN406 TH11 TH17 CN404 TH12 TH18 CN405 TH13 TH14 TH20 CN406 3 4 CN406 5 6 2 Pull out the sensor connector from the I O board Do not pull on the lead wire Measure the resistance with a tester If the measured value is within 10 of the value as s...

Page 135: ... OFF 3 OFF ON ON OFF 4 OFF OFF ON ON Output pulses change in the following orders when the Valve is closed 1 2 3 4 1 Valve is open 4 3 2 1 4 1 When the LEV opening angle does not change all the output phases will be off 2 When the output is open phase or remains ON the motor cannot run smoothly and rattles and vibrates Upon power on a 2260 pulse signal is sent to the LEV to determine the valve pos...

Page 136: ... 1 Valve is closed 8 7 6 5 4 3 2 1 8 1 When the LEV opening angle does not change all the output phases will be off 2 When the output is open phase or remains ON the motor cannot run smoothly and rattles and vibrates Upon power on a 520 pulse signal is sent to the LEV to determine the valve position and bring the valve to the position indicated by in the diagram Pulse signal is output for approxim...

Page 137: ...makes a closing and opening sound the valve has a problem Replace the LEV Disconnected or short circuited LEV motor coil Measure resistance between the coils red white red orange brown yellow brown blue using a tester They are normal if resistance is 150ohm 10 Replace the LEV coils Measure resistance between the coils red white red orange brown yellow brown blue using a tester They are normal if r...

Page 138: ...rce will be applied and the pipe will be bent 2 Installing the coils Fix the body tightly at the bottom Part A in the figure so that the body will not move then insert the coils from the top and insert the coil stopper securely in the pipe on the body Hold the body when pulling out the coils to prevent so that the pipe will not be bent If the coils are pushed without the body gripped undue force w...

Page 139: ...oard has dropped to DC20V or less It takes about 10 minutes to discharge electricity after the power supply is turn off 2 The IPM on the inverter becomes damaged if there are loose screws are connectors If a problem occurs after replacing some of the parts mixed up wiring is often the cause of the problem Check for proper connection of the wiring screws connectors and Faston terminals 3 To avoid d...

Page 140: ... the inverter output wiring is not running parallel to the power supply wiring and the transmission lines 3 Check that the shielded wire is used as the transmission line when it is required and check that the grounding work is performed prop erly on the shielded wire 4 Meg failure for electrical system other than the inverter 5 Attach a ferrite core to the inverter output wiring Contact the fac to...

Page 141: ...e is no liquid re frigerant in the compressor If there is none replace the com pressor 2 Compressor coil resistance failure Coil resistance value of 0 092 ohm 20 C Replace the compressor 3 Check wheth er the inverter is damaged No load 1 Disconnect the invert er output wire from the terminals of the INV board SC U SC V SC W 1 Inverter related problems are de tected Connect the short circuit connec...

Page 142: ... persists after compressor startup was repeated several times If normal operation is re stored check the crank case heater for problems d Check that there is a pres sure difference between high and low pressures af ter compressor startup Check the high pressure with LED monitor for changes Replace the compressor if there is no pressure differ ence the compressor may be locked 2 There is a voltage ...

Page 143: ...ls on the power terminal block TB4 Zero to several ohm or Meg failure Check each part and wiring Refer to 5 Simple checking procedures for individual components of main inverter circuit page 137 IGBT module Rush current protection resistor Electromagnetic relay DC reactor 3 Turn on the power again and check again 1 Main power breaker trip 2 No remote control display 4 Turn on the unit and check th...

Page 144: ...sconnect all the wiring connected the INV board and make the measurement 2 Tester restriction Use the tester whose internal electrical power source is 1 5V or greater Use the dry battery powered tester The accurate diode specific resistance cannot be measured with the button battery powered card tester as the applied volt age is low Use a low range tester if possible A more accurate resistance can...

Page 145: ... SC P1 FT N SC L1 SC L2 SC L3 Red SC P1 5 200 ohm 5 200 ohm 5 200 ohm FT N SC L1 5 200 ohm SC L2 5 200 ohm SC L3 5 200 ohm Black SC P2 FT N SC U SC V SC W Red SC P2 5 200 ohm 5 200 ohm 5 200 ohm FT N SC U 5 200 ohm SC V 5 200 ohm SC W 5 200 ohm SC U SC W SC V FT N SC P1 SC P2 SC L1 SC L2 SC L3 ...

Page 146: ...n turn the power on Fix the wiring and connector disconnection Check for shorted transmission line or power feed collision for centralized control Replace the control board Check the voltage between No 1 and No 2 pins of the CN102 on the power supply board for the transmission line Check the voltage between No 1 and No 3 pins of the noise filter CN4 Check the voltage between No 1 and No 3 pins of ...

Page 147: ...the brazed sections on the pipes recover the refrigerant Braze under nitrogen purge to prevent oxidation 3 If any component including the compressor malfunctions only replace the affected parts it is not necessary to replace the entire unit 4 Be sure to recover the refrigerant from the unit before disposing of the unit 5 If the cause of the problem cannot be identified contact the service desk wit...

Page 148: ...f R410A 1 Refer to Chapter I 5 Vacuum Drying Evacuation for detailed procedure page 7 WARNING Do not use refrigerant other than the type indicated in the manuals provided with the unit and on the nameplate Doing so may cause the unit or pipes to burst or result in explosion or fire during use during repair or at the time of disposal of the unit It may also be in violation of applicable laws MITSUB...

Page 149: ...exchanger assy Hot water side Pressure sensor HP Pressure sensor LP Pressure switch assy Pressure switch assy Heat exchanger assy Heat source side Thermistor TH2 Thermistor TH13 Thermistor TH14 Scroll compressor MAIN Scroll compressor SUB Thermistor TH20 Thermistor TH1 Thermistor TH5 Thermistor TH6 Thermistor TH17 Thermistor TH11 Thermistor TH18 Thermistor TH12 Thermistor TH8 Thermistor TH4 Thermi...

Page 150: ... to OFF 1 At the back of the product remove the service panel BB 2 Perform refrigerant recovery from the high pressure check joints If the refrigerant is recovered from low pressure check joint there is a possibility that a compressor may break by the shortage of lubricant 1 Disconnect the connector of the low voltage wiring connected to the control board of the SUB control box and then remove the...

Page 151: ...box 4 Remove the 3 clamps securing the wiring to the back of the SUB control box support plate and then remove the SUB control box support plate 1 Remove the 4 mounting screws of injection pipe fixing plates A and then remove injection pipe fixing plate A 2 Remove the parts around the brazed portions such as the injection pipe fixing saddle 2 screws the heat insulating pipes wrapped around the dis...

Page 152: ... 2 screws and the remove injection pipe fixing plate B and attachment 2 Remove the thermistor spring 3 Attach the thermistor spring and the injection pipe fixing plate B to the new compressor When attaching the injection pipe fixing pate B push it so that the butyl rubber touches the compressor shell and tighten the screws Also check that it is attached so that the fixing plate edge and terminal b...

Page 153: ... cause the oil in the refrigerant system to be discharged resulting in compressor malfunction 2 While evacuation is being performed assemble the unit by performing the procedure in reverse in the order of 6 5 4 3 3 Perform refrigerant charging from the high pressure check joints Be sure to perform refrigerant charging from the high pressure check joints so that a back pressure is not applied to th...

Page 154: ...the compressor terminal part will be a live part even if you set the SWS1 switch to OFF 1 At the back of the product remove the service panel BU BU PIPE BU PIPE2 and BB 2 Perform refrigerant recovery from the high pressure check joints If the refrigerant is recovered from low pressure check joint there is a possibility that a compressor may break by the shortage of lubricant 1 Disconnect the conne...

Page 155: ... control box 1 Open the SUB control box 2 Disconnect the compressor power wiring of the SUB compressor terminal 1 Open the SUB control box even further disconnect the compressor power wiring from the MAIN compressor terminal and then remove the 2 clamps 1 securing the compressor power wiring of the MAIN compressor terminal 2 Remove the 2 fixing clamps 2 of the low voltage wiring running along the ...

Page 156: ...l block 3 Disconnect the cooling fan connector relay connector white belt heater wiring CN502 white solenoid coil wiring CN501 white and high voltage switch wiring CN801 yellow and then remove the 2 clamps 2 securing the high voltage wiring 4 Remove the 1 clamp 3 securing the compressor power wiring 5 Disconnect the power wires and ground wire and then remove the 1 clamp 4 securing the wiring 1 Re...

Page 157: ...ct remove the power box support plate 5 screws 2 Remove the insulation 2 places covering the heat exchanger nameplate holes The removed parts are required as they will be reattached after replacement of the heat exchanger Do not throw them away 1 Remove the 3 fixing screws of the hot water side heat exchanger 2 Drag out the hot water side heat exchanger to replace it Be careful handling heavy obje...

Page 158: ...move the brazing from the discharge pipes and liquid pipes 2 Remove the discharge pipe fixing saddle packing 3 places and then remove the discharge pipes 2 types and liquid pipes 2 types 3 Attach the pipes and pipe fixing saddle packing removed in 2 to the new hot water side heat exchanger 4 Join the discharge pipe and liquid pipe brazing portions 1 Attach the hot water side heat exchanger to the ...

Page 159: ...use the oil in the refrigerant system to be discharged resulting in compressor malfunction 2 While evacuation is being performed assemble the unit by performing the procedure in reverse in the order of 9 8 7 6 5 4 3 3 Perform refrigerant charging from the high pressure check joints Be sure to perform refrigerant charging from the high pressure check joints so that a back pressure is not applied to...

Page 160: ...WS1 switch to OFF 1 At the back of the product remove the service panel BB and BB PIPE 2 Perform refrigerant recovery from the high pressure check joints If the refrigerant is recovered from low pressure check joint there is a possibility that a compressor may break by the shortage of lubricant 1 Disconnect the connector of the low voltage wiring connected to the control board of the SUB control b...

Page 161: ...ontrol box 1 Open the SUB control box 2 Disconnect the compressor power wiring of the SUB compressor terminal 3 Remove the 1 mounting screw of the SUB control box and then remove the SUB control box 4 Remove the 3 clamps securing the wiring to the back of the SUB control box support plate and then remove the SUB control box support plate 1 Remove the 2 clamps 1 securing the compressor power wiring...

Page 162: ...perature thermistors and then remove the wall temperature thermistors from the heat exchanger The removed parts are required as they will be reattached after replacement of the heat exchanger Do not throw them away 1 Remove the pipe fixing saddle packing 3 places 2 Remove the covers of the suction pipes and LEV pipes 3 Remove the insulation 2 places covering the heat exchanger nameplate holes The ...

Page 163: ... Remove the 2 fixing screws of the heat source water side heat exchanger 1 Remove the 2 fixing screws of the heat source water side heat exchanger at the front of the product 1 Drag out the heat source water side heat exchanger from the back of the product to replace it Be careful handling heavy objects when performing the replacement work 2 Attach heat source water side heat exchanger and LEV pip...

Page 164: ...ation with a vacuum pump from the high pressure check joints Evacuating the system through the low pressure check joint will cause the oil in the refrigerant system to be discharged resulting in compressor malfunction 3 While evacuation is being performed assemble the unit by performing the procedure in reverse in the order of 8 7 6 5 4 3 4 Perform refrigerant charging from the high pressure check...

Page 165: ... IX Troubleshooting 158 HWE1312A GB ...

Page 166: ... 159 HWE1312A GB X Attachments 1 R410A saturation temperature table 161 ...

Page 167: ... 160 HWE1312A GB ...

Page 168: ...0 15 10 46 10 77 11 07 11 38 11 68 11 98 12 28 12 57 12 87 13 16 13 45 13 74 14 03 14 31 14 59 14 88 15 16 15 43 15 71 15 99 16 26 16 53 16 80 17 07 17 34 17 60 17 87 18 13 18 39 18 65 18 91 19 17 19 42 19 68 19 93 20 18 20 43 20 68 20 93 21 18 21 42 21 67 21 91 22 15 22 39 22 63 22 87 23 11 23 34 23 58 23 81 24 04 24 28 24 51 24 74 24 96 25 19 25 42 25 64 25 87 3 89 4 25 4 61 4 96 5 31 5 66 6 00 ...

Page 169: ...Saturated gas MPa gauge 4 00 4 01 4 02 4 03 4 04 4 05 4 06 4 07 4 08 4 09 4 10 4 11 4 12 4 13 4 14 4 15 63 08 63 19 63 31 63 42 63 53 63 64 63 75 63 86 63 97 64 08 64 19 64 30 64 41 64 52 64 63 64 74 63 19 63 27 63 38 63 49 63 60 63 71 63 82 63 93 64 04 64 15 64 26 64 37 64 48 64 59 64 69 64 80 ...

Page 170: ......

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Mitsubishi Electric CRHV-P600YA-HPB, Service Handbook

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