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LG THERMA V AHNW16606B0 Service Manual

Air-to-water heat pump
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SERVICE MANUAL
AIR-TO-WATER
HEAT PUMP
Before servicing the unit, read the safety precautions in general SVC manual.
Only for authorized service personnel.
P/NO : MFL69717001
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL
www.lg.com

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Summary of Contents for LG THERMA V AHNW16606B0

  • Page 1 SERVICE MANUAL AIR-TO-WATER HEAT PUMP Before servicing the unit, read the safety precautions in general SVC manual. Only for authorized service personnel. GENERAL P/NO : MFL69717001 www.lg.com Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 2 Content 1. General............................3 2. Specification ...........................8 3. Function Table ..........................13 4. Pump Hydraulic Performance.......................14 5. Piping Diagrams ...........................15 6. Wiring Diagrams ...........................16 7. Exploded View..........................21 8. Model Information.........................29 9. Replacement Procedure for Compressor ..................31 10. Caution for Assembling Outdoor Panels after Test Run .............32 11.
  • Page 3 1. General The manual describes the process of setting up and use of the device. Servicing and maintenance of the device can only be performed by qualified personnel. Read the manual carefully before working on the device, this way you will be informed about the intended use, functionality and process of troubleshooting the device.
  • Page 4 1.2 General NOTE • Before beginning the service procedure, it is necessary to read the service manual. • The installation of the device has to be performed in accordance with the manual; otherwise the manufacturer does not acknowledge the warranty. •...
  • Page 5 • Prepare for strong wind or earthquake and install the unit at the specified place. - Improper installation may cause the unit to topple and result in injury. • Do not install the product on a defective installation stand. - It may cause injury, accident, or damage to the product. •...
  • Page 6 CAUTION Installation • Always check for gas (refrigerant) leakage after installation or repair of product. - Low refrigerant levels may cause failure of product. • Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.
  • Page 7 • Be sure the installation area does not deteriorate with age. - If the base collapses, the air conditioner could fall with it, causing property damage, product failure, or personal injury. • Install and insulate the drain hose to ensure that water is drained away properly based on the installation manual.
  • Page 8 2. Specification Indoor Indoor unit AHNW16606B0 /HN1616T NB0 Version Controller TT3000 (MD1) Device placement Indoor Electrical data 1f connection of the internal unit Frequency Rated voltage ~ 230 Max. operational current 11.1 19.9 Max. electrical power 2.52 4.52 Fuses 1 x C16 1 x C20 Electrical power cable 3 x 4...
  • Page 9 Note : 1) With the cable we have taken into account laying B2 from the table A.52.4 – IEC 60364-5-52. The cable in the installation pipe is fixed to the wall. The dimensions of the electrical cables must always be checked or determined by the designing engineer of electrical installations. 2) Joint maximal load (circulation pumps, electronic valves ...) which can be connected to or powered by the internal unit, must not exceed the specified value.
  • Page 10 Outdoor Outdoor Units AHUW146A2 AHUW096A3 Combination Indoor Units AHNW16606B0 AHNW16606B0 Power Supply Ø / V / Hz 1/220-240/50 1 / 220-240 / 50 Maximum Running Cooling Current Heating For Power Supply Wiring Connections Number of wires (Included Earth) Cooling(Under floor) 11.0 * Capacity Heating(Under floor)
  • Page 11 Outdoor Units AHUW126A3 AHUW146A3 AHUW166A3 Combination Indoor Units AHNW16606B0 AHNW16606B0 AHNW16606B0 Power Supply Ø / V / Hz 1 / 220-240 / 50 1 / 220-240 / 50 1 / 220-240 / 50 Cooling Maximum Running Current Heating For Power Supply Number of Wiring Connections (Included Earth)
  • Page 12 Outdoor Units AHUW128A3 AHUW148A3 AHUW168A3 Combination Indoor Units AHNW16606B0 AHNW16606B0 AHNW16606B0 Power Supply Ø / V / Hz 3 / 380-415 / 50 3 / 380-415 / 50 3 / 380-415 / 50 Cooling 16.1 16.1 16.1 Maximum Running Current Heating 16.1 16.1...
  • Page 13 3. Function Table Indoor Features Notes Function availability ensures energy for defrost hydraulic separator to bal- Buffer tank 40liters ance the heating system Circulation pump 3way valve control to switch between space heating and DHW heating Electrical heater on/off for heating and DHW 3 X 2kW max Stop by flow switch Safety valve...
  • Page 14 4. Pump Hydraulic Performance Pump capacity AHNW16606B0 Pump model : Yonos PARA RS 25/7.0 PWM1 Ku WARNING Selecting a water flowrate outside the curves can cause damage to or malfunction of the unit. - 14 -...
  • Page 15 5. Piping Diagrams Return flow – heating system Buffer tank Flow – heating system Circulating pump DHW – Hot water Electric flow heater DHW – Circulation DHW – Cold water Condenser ODU – gas pipe 3 Way Valve ODU – liquid pipe DHW tank Mg.
  • Page 16 6. Wiring Diagrams Indoor Unit Model : AHNW16606B0 - 16 -...
  • Page 17 ELEMENT TERMINAL BLOCK DESCRIPTION L1, L2, L3, N, PE Power cable A5, GND Temperature sensor for external temperature Q11, N Cooling valve Q12, N, PE Additional external source Q7, N, PE Circulation pump of heating cycle 1 (optional) Q8, N, PE Circulation pump of heating cycle 2 (optional) N, Q9+, Q10- Mixing valve of heating cycle 2 (optional)
  • Page 18 Outdoor Unit Models : AHUW146A2 Models : AHUW096A3 - 18 -...
  • Page 19 Models : AHUW166A3, AHUW146A3, AHUW126A3 - 19 -...
  • Page 20 Models : AHUW168A3, AHUW148A3, AHUW128A3 - 20 -...
  • Page 21 7. Exploded View Indoor Unit - 21 -...
  • Page 22 Location No. DESCRIPTION Kronoterm SVC P/No LG P/No Remark 552207 Valve,Safety 2222000017217 COV34147015 SAFETY VALVE 1/2 3 BAR 265020 gauge,pressure 2222000022358 COV34147016 MANOMETER 1/4 0-6bar 349001 Damper,Vent 2222000004071 COV34147017 VENT 3/8 AUTOMATIC 158580 Pump,Water 2222000084486 COV34147025 CIRCULATION PUMP _Wilo Pump...
  • Page 23 Outdoor Unit Models : AHUW146A2 554031 549610 552111 559010 552115 546810A 237204 546810B 435300 435512 554031 268711A W6200B 437211 661400 548490 W6200A W6640 55211G 649950 437212 561410 148000 237205 552117 552116 552203B 552203A 237202 552120A 349480 435301 447910 137213 554160 W4986B 135500B 435513...
  • Page 24 Location No. Description Information Etc. 263230A Thermistor Assembly,NTC SUC/DIS Temperature CN_TH3 263230B Thermistor Assembly,NTC PIPE/AIR Temperature CN_TH2 263230C Thermistor Assembly,NTC MID-PIPE Temperature CN_TH4 W6631A Harness,Multi Compressor Leadwire W6631F Harness,Single Base Pan Heater Connector 250V 1A W6631G Harness,Single Sump Heater Connector 250V 1A 553000A Heater,Sump...
  • Page 25 Models : AHUW096A3 549610 552113 554031 552115 559010 546810 435512 447910 137213A 435300 237202 437212 137213B 435301 349480 435513 237205 135500 552117 437211 552116 430410 649950 661400 152503 165000 548490 Pressure Sen sor 55211E 552200 148000 552202 268711B W6200 W6631 552203B 552560 561410...
  • Page 26 Models : AHUW166A3, AHUW146A3, AHUW126A3 554031 549610 552115 559010 552111 546810A 237204 546810B 435300 435512 268711C 554031 237200C 553000 261704 268711A 437211 W0FZZB 237200A 137215 552200 W6200 268711B 237200B 661400 W6640A W52240A 548490 W6640B W52240B 249950 55211G 437212 W5210DA 561410 148000 237205 165000...
  • Page 27 Models : AHUW168A3, AHUW148A3, AHUW128A3 554031 549610 552111 559010 552115 546810A 237204 546810B 435300 435512 268711C 554031 237200C 553000 261704 268711A 437211 237200A 137215 552200 W6200 268711B 237200B 661400 W6640A W52240A 548490 W6640B W52240B 649950 55211G 437212 552117A 561410 148000 237205 165000 552117B...
  • Page 28 Location No. Description Information Etc. 263230D Thermistor Assembly,NTC SUC Temperature CN_TH4 263230E Thermistor Assembly,NTC DIS Temperature CN_TH5 263230H Thermistor Assembly,NTC Condenser Temperature CN_TH6 263230F Thermistor Assembly,NTC Outdoor air Temperature CN_TH7 263230G Thermistor Assembly,NTC MID-PIPE Temperature CN_TH8 W6631A Harness,Multi Compressor Leadwire W6631F Harness,Single Base Pan Heater Connector...
  • Page 29 8. Model Information With advanced inverter technology, is suitable for applications like under floor heating, under floor cooling, and hot water generation. By Interfacing to various accessories user can customize the range of the application. In this chapter, general information of is presented to identify the installation procedure.
  • Page 30 Model name and related information Model Name Capacity Built-In Electric Power Source Heater(kW) Outdoor Unit Indoor Unit Heating(kW) Cooling(kW) AHUW146A2 14.0 11.0 AHUW096A3 AHUW126A3 12.0 10.4 220-240 V ~ 50 Hz AHUW146A3 14.0 11.0 1Ø 4(2+2) AHNW16606B0 3Ø 6(2+2+2) AHUW166A3 16.0 12.0 AHUW128A3...
  • Page 31 9. Replacement Procedure for Compressor 1. Remove the sound proof covering the faulty com- pressor, and disconnect the power 2. Disconnect the brazing sections of suction pipe and discharge pipe by using brazing torch after the refrig- erant has been pumped out or collected completely. 3.
  • Page 32 10. Caution for Assembling Outdoor Panels after Test Run When assemble the outdoor panels after replacement, make sure that screws of top panel are assembled as shown figure below. If screws are not assembled, it allows rain come into control box causing defect of unit.
  • Page 33 11. Trouble shooting Guide (Indoor Unit) Supply voltage Description of error During start-up of a bigger load (compressor, heat, additional source ...) or unsuitable supply voltage it collapses. Response The voltage of one or all electronic components of the controller assembly collapses (resets), thus does not operate properly and sends faulty information into the PLC.
  • Page 34 Displaying the error ERROR **NO WATER Description of error There was no flow 3X in a row at compressor start-up Response of internal unit After resolving the error, the device restarts normally by pressing the MENU button controller • Not enough water in the heating system, •...
  • Page 35 Displaying the error MODULE 1 - ALARM Description of error Failure of module 1 Response of internal unit The device automatically restarts after the error is resolved controller Possible causes • The wiring of the relay panel of module 1 is damaged or not implemented correctly. •...
  • Page 36 Displaying the error MODULE 2 - ALARM Description of error Failure of module 2 Response of internal unit The device automatically restarts after the error is resolved controller Possible causes • The wiring of the expansion relay panel of module 2 is damaged or not implemented correctly. •...
  • Page 37 Displaying the error Position of temperature sensor ERROR Sensor 1 MD1:A1 – temperature sensor for inlet water (return line) ERROR Sensor 2 MD1:A2 – temperature sensor for DHW ERROR Sensor 3 MD1:A3 - temperature sensor of the entry of the refrigerant into the condenser ERROR Sensor 4 MD1:A4 - temperature sensor of the exit of the refrigerant from the condenser ERROR Sensor 5...
  • Page 38 Displaying the error Caution flow: xx s Description of error No flow Response of internal unit controller Possible causes Disturbances in water flow. The error is displayed in the diagnostics display: • If it appears less than 3x in a row when the compressor is switched on, the device con- Troubleshooting tinues to function normally.
  • Page 39 Displaying the error ALARM DHW Description of error HP did not reach the minimal temperature 3x Response of internal unit After resolving the error, the device restarts normally by pressing the MENU button controller • Too low water flow through the heat exchanger in the DHW, Possible causes •...
  • Page 40 12. Trouble shooting Guide (Outdoor Unit) Main PCB assembly(Inverter) - Red LED means error no. 10’s digit, and green LED means 1’s digit, and when red and green simultaneously blink, it means 100’s unit. Ex) Inverter compressor IPM defect Error : error number 21 Error Code Description LED 1 (Red)
  • Page 41 Display Title Cause of error Check point & Normal condition code • An instant over current in the U,V,W phase - Comp lock • Instant over current - The abnormal connection of U,V,W DC PEAK • Over Rated current • Over load condition (IPM Fault) •...
  • Page 42 ▶AHUW096A3 1. Wait PCB(Inverter) DC voltage is discharged after main power off. 2. Pull out AC(L), AC(N) connectors and U,V,W COMP Connector. 3. Set multi tester to resistance mode. 4. If the value between P and N terminal of IPM is short(0Ω) or open(hundreds MΩ), PCB needs to be replaced.(IPM dam- aged) 5.
  • Page 43 ▶AHUW146A2/AHUW126A3/AHUW146A3/AHUW166A3 AC(N)-BLUE AC(L)-BROWN U,V,W CONNECTOR 1. Wait PCB(Inverter) DC voltage is discharged after main power off. 2. Pull out AC(L), AC(N) connectors and U,V,W COMP Connector. 3. Set multi tester to resistance mode. 4. If the value between P and N terminal of IPM is short(0Ω) or open(hundreds MΩ), PCB needs to be replaced.(IPM dam- aged) 5.
  • Page 44 ▶AHUW128A3/AHUW148A3/AHUW168A3 1. Wait PCB(Inverter) DC voltage is discharged after main power off. 2. Pull out AC(L), AC(N) connectors and U,V,W COMP Connector. 3. Set multi tester to resistance mode. 4. If the value between P and N terminal of IPM is short(0Ω) or open(hundreds MΩ), PCB needs to be replaced.(IPM dam- aged) 5.
  • Page 45 Display Title Cause of error Check point & Normal condition code 1. Malfunction of Compressor 2. Blocking of Pipe Max. C/T Input Over Current 3. Low Voltage Input 4. Refrigerant, Pipe length, Blocked... WARNING Before checking PCB(Inverter) or each outdoor electric parts, wait for 3 minutes after the power is off. When measuring at standby state of power supply, after checking the measurement mode of the meter, be careful of the short-circuits with other parts.
  • Page 46 Check Point 1. Check the power source.(230V ±15%) 2. Check the fan operation is right. 3. Check the current. 4. Check the install condition. 5. Check the CT Sensor Output signal (AHUW096A3 - Check output the CT Sensor : DC 2.5±0.2V AHUW146A2/AHUW126A3/AHUW146A3/AHUW166A3 - Check output pin 2.3 of the CT Sensor : DC 2.5±0.2V AHUW128A3/AHUW148A3/AHUW168A3 - Check input_current_T_PFC and R_PFC of the CT sensor : DC 2.5±0.2V) ▶AHUW096A3...
  • Page 47 Input_Current_T_PFC Input_Current_R_PFC DC LINK-Voltage _ INV ▶AHUW128A3/AHUW148A3/AHUW168A3 <Inverter PCB> <CT Sensing Check Point > - 47 -...
  • Page 48 Display Title Cause of error Check point & Normal condition code • DC Link Voltage is • Check CN_(L), CN_(N) Connection above 420Vdc DC Link High / Low Volt • Check Input Voltage • DC Link Voltage is • Check PCB DC Link voltage sensor parts below 140Vdc WARNING Before checking PCB(Inverter) or each outdoor electric parts, wait for 3 minutes after the power is off.
  • Page 49 Check Point 1. Check the WCN_P(L),P(N) Connection condition at the main PCB(Heater). (Refer to wiring diagram) 2. Check the DC Link voltage at not operating(280V 3. Check the DC Link voltage at Comp operating(340V 4. Check DC Link Sensing Signal(AHUW**6A2): 2.4~2.8V (Refer the Picture) 5.
  • Page 50 ▶AHUW146A2/AHUW126A3/AHUW146A3/AHUW166A3 ▶AHUW128A3/AHUW148A3/AHUW168A3 - 50 -...
  • Page 51 Display Title Cause of error Check point & Normal condition code • Check the connection of comp wire “U,V,W” DC Compressor • Compressor • Malfunction of compressor Position Starting fail error • Check the component of “IPM”, detection parts. WARNING Before checking PCB(Inverter) or each outdoor electric parts, wait for 3 minutes after the power is off.
  • Page 52 1. IPM Check Nw Nv Nu 23 22 21 SPM3 1. Wait PCB DC voltage is discharged after main power off. 2. Pull out V, V, W COMP connector. 3. Set multi tester to resistance mode. 4. If the value between P and N terminal of IPM is short(0Ω) or open(hundreds MΩ), PCB needs to be replaced.(IPM dam- aged) 5.
  • Page 53 2. CT Sensing Check • Inspecting PCB phase current sensing circuit 1. Set Multi-tester DC voltage measurement mode. 2. Mesure the below mesureing point DC voltages at Power-on standby state. 3. If the measurements are outside DC 2.5V ± 0.2V, the parts are decided as burned. Black <CT Sensing Check Point>...
  • Page 54 Display Title Cause of error Check point & Normal condition code 1. Overload operation (Pipe clogging/Covering/EEV defect/Ref. overcharge) 2. Compressor damage (Insulation damage/Motor PCB(Inverter) input damage) AC Input Instant over current is over 3. Input voltage abnormal (L,N) Current Error 100A(peak) for 2us 4.
  • Page 55 ▶AHUW096A3 <Short Check Point> After turning off the main power R24N After turning off the between the ends of the resistance will between the ends o be measured 620~670Ω. be measured 620~6 ▶AHUW146A2/AHUW126A3/AHUW146A3/AHUW166A3 <Short Check Point> - 55 -...
  • Page 56 ▶AHUW128A3/AHUW148A3/AHUW168A3 - 56 -...
  • Page 57 Display Title Cause of error Check point & Normal condition code 1. Overload operation (AHUW**6A2) (Pipe clogging/Covering/EEV defect/Ref. over- Inverter Compressor charge) Inverter compressor over input current is 30A. 2. Compressor damage(Insulation damage/Motor current (AHUW**8A2) damage) Inverter Compressor 3. Input voltage low input current is 24A.
  • Page 58 Display Title Cause of error Check point & Normal condition code • Overload operation (Outdoor fan constraint, screened, blocked) • Check outdoor fan constraint/ screened/ flow High temperature in • Refrigerant leakage structure Discharge pipe of the (insufficient) • Check refrigerant leakage inverter compressor •...
  • Page 59 Display Title Cause of error Check point & Normal condition code • Defective low pressure sensor • Defective unit fan • Refrigerant shortage/leakage • Deformation because of damage of refrigerant pipe • Defective unit EEV Excessive decrease of low Low Presser Error •...
  • Page 60 Display Title Cause of error Check point & Normal condition code • Open / Short 1. Bad connection of thermistor connector D-pipe sensor (Inverter) • Soldered poorly 2. Defect of thermistor connector (Open/Short) • Internal circuit error 3. Defect of outdoor PCB(Inverter) •...
  • Page 61 Display Title Cause of error Check point & Normal condition code • Bad connection of connector PCB(Inverter) • Bad connection high pressure connector Sensor error of high Abnormal value of sensor • Defect of high pressure connector (Open/Short) pressure (Open/Short) •...
  • Page 62 Display Title Cause of error Check point & Normal condition code Checking the communica- PCB Communication • Generation of noise source interfering with com- tion state between Main Error munication PCB and Inverter PCB WARNING Before checking PCB(Inverter) or each outdoor electric parts, wait for 3 minutes after the power is off. When measuring at standby state of power supply, after checking the measurement mode of the meter, be careful of the short-circuits with other parts.
  • Page 63 ▶ AHUW128A3/AHUW148A3/AHUW168A3 Installation environment interfering Purpose Items for checking Checking method of afulty points the communication Insufficient insertion of wires Damage of wire coating : Interference with wires or wire coating damage with chopping Inverter PCB LED : Replacement of inverter PCB during LED Off after resetting - 63 -...
  • Page 64 Display Title Cause of error Check point & Normal condition code • Power input AC 230V. • The connector for transmission is disconnected. Title • The connecting wires are misconnected. • Communication poorly Communication • The communication line is shorted at GND. (PCB(Heater) ’...
  • Page 65 Display Title Cause of error Check point & Normal condition code Prevention of phase unbal- Open and Reverse Phase ance and prevention of Main power wiring fault Error reverse rotation of con- stant-rate compressor n Error diagnosis and countermeasure flow chart Items for checking Sub-items for checking Checking for power...
  • Page 66 ▶AHUW128A3/AHUW148A3/AHUW168A3 n Judgment Method of R,S,T phase loss - Set the tester in AC voltage measurement mode (The part having wave pattern) - The part that does not generate voltage was upgraded. - Power module requires checking. n Judgment method of open and reverse phase of R,S,T - Operation with replacement of R and S phases only Br own B Black Green...
  • Page 67 Display Title Cause of error Check point & Normal condition code 1. EEPROM contact defect/wrong insertion PCB(Inverter) & Main EEPROM Access error 2. Different EEPROM Version EEPROM check sum error and Check SUM error 3. ODU Inverter & Main PCB assembly 1 damage WARNING Before checking PCB(Inverter) or each outdoor electric parts, wait for 3 minutes after the power is off.
  • Page 68 ▶AHUW146A2/AHUW126A3/AHUW146A3/AHUW166A3 EEPROM ▶AHUW128A3/AHUW148A3/AHUW168A3 EEPROM - 68 -...
  • Page 69 Display Title Cause of error Check point & Normal condition code • Overload operation (Outdoor fan constraint, screened, blocked) • Check outdoor fan constraint / screened / flow • Unit heat exchanger con- structure High temperature taminated • Check if refrigerant overcharged in Cond.
  • Page 70 Display Title Cause of error Check point & Normal condition code 1. Part no. : EBR37798101~09 - Check the heatsink sensor : 10㏀/at 25℃(Unplugged) - Check the outdoor fan is driving rightly 2. Part no. : EBR37798112~21 Heatsink sensor detected Heat sink Temp, - Check the soldered condition in the 22,23 pin of high temp.(85℃)
  • Page 71 ▶AHUW096A3 PFCM: Measuring resistance between No.19,20 pin ▶AHUW146A2/AHUW126A3/AHUW146A3/AHUW166A3 Ω ▶AHUW128A3/AHUW148A3/AHUW168A3 ③ [IPM] [PFCM] Heatsink Temp. output Pin ③ - 71 -...
  • Page 72 Display Title Cause of error Check point & Normal condition code 1. ODU fan locking Fan RPM is 10RPM or 2. Heatsink assembly of PCB assembly 1 condition less for 5 sec. when ODU abnormal Fan Lock Error fan starts or 40 RPM or 3.
  • Page 73 ▶AHUW096A3 Check voltage betwen 1pin and 4pin of fan motor Fan motor connector Tester <Main PCB> ▶AHUW146A2/AHUW126A3/AHUW146A3/AHUW166A3 ▶AHUW128A3/AHUW148A3/AHUW168A3 - 73 -...
  • Page 74 Display Title Cause of error Check point & Normal condition code (AHUW**6A2) 1. Overload operation (Pipe clogging/Covering/EEV PCB(Inverter) input defect/Ref.overcharge) 2. Compressor damage power current is over AC input instant over cur- 48A(Peak) for 2ms. (Insulation damage/Motor damage) rent error (AHUW**8A2) 3.
  • Page 75 ▶AHUW096A3 < Noise Filter wiring Check Point > < Main PCB wiring Check Point > < Input Power Source Check Point > - 75 -...
  • Page 76 ▶ AHUW146A2/AHUW126A3/AHUW146A3/AHUW166A3 - 76 -...
  • Page 77 ▶AHUW128A3/AHUW148A3/AHUW168A3 - 77 -...
  • Page 78 Sensor resistance table (In Outdoor Unit) Pipe Temp Air Temp B Constant 3977 B Constant 3977 Std Temp Std Temp Resistance Resistance Temp Resistance Volt Temp Resistance Volt 102.17 4.714 204.35 4.72 73.49 4.611 146.97 4.62 53.55 4.481 107.09 4.492 39.5 4.322 4.336...
  • Page 79 Heatsink Temp D-Pipe Temp B Constant 3970 B Constant 3500 Std Temp Std Temp Resistance Resistance Temp Resistance Volt Temp Resistance Volt 102.17 4.71 2845.99 4.969 73.49 4.61 585.66 4.851 53.55 4.48 465.17 4.814 39.5 4.32 372.49 4.77 29.48 4.13 300.58 4.717 22.24...
  • Page 80 n How to check the insulation resistance between the compressor and panel Measure the resistance between a compressor terminal and Compressor panel. terminals Comp Pipe Insulation Terminal Resistance U-panel ≥ 10MΩ V-panel ≥ 10MΩ C/BoxSash W-panel ≥ 10MΩ 1. Turn the switch of the tester to “Resistance" mode and check th eresistance 2.

This manual is also suitable for:

Therma v hn1616t nb0Therma v ahuw146a2Therma v ahuw096a3Therma v ahuw126a3Therma v ahuw146a3Therma v ahuw166a3 ... Show all

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