ComfortStar VRFPLUS CSCMA Series Service Manual Download | Manualshive

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CSCMA-APH-6-SM1907A R410A All DC Inverter Mini VRF

General Information 5

2.6 Wide operation temperature range

No matter in extremely cold winter when outdoor
temperature gets as low as -15°C or in hot summer
when temperature is up to 43°C, the Mini VRF
system will keep stable performance.

2.7 Flexible piping design

2.8 Flexible indoor unit’s connection

Mini VRF with intelligent control gives you independent zoning control with maximum flexibility.
A single outdoor unit supports up to seven indoor units, freeing up considerable space outside. Use your
backyard more wisely with much more space available created by less number of outdoor units.



Max. 5 indoor units for a 10.5kW outdoor unit installation



Max. 6 indoor units for a 12kW outdoor unit installation



Max. 6 indoor units for a 14kW outdoor unit installation



Max. 7 indoor units for a 16kW outdoor unit installation

2.9 Simple signal line connection

Installation is much easier as the communication wiring between indoor & outdoor units can be shared.

It’s easy for the user to retrofit the existing system with a centralized control by simply connecting to outdoor

units.

Longest

piping length

Level

difference

between

IDU~ODU

The IDU to the

nearest branch

pipe

The first branch

joint to the farthest

indoor unit

Level differece

between IDU~IDU

PQE & XYE, just only one group of communication wire of PQE,
achieved both of communication for indoor & outdoor unit and
network.
Reversible communication, central controller can be connected
from indoor side or outdoor side as you wish.

P Q E

P Q E

P Q E

P Q E

P Q E

X Y E

X Y E

Piping Length

Permitted Value

Total piping length (Actual)

100m

Longest piping

length

Actual

45m(10.5kW)

60m (12~16kW)

Equivalent

50m(10.5kW)

70m (12~16kW)

The first branch joint to the

farthest IDU

20m

The IDU to the nearest branch pipe

15m

Level difference

between ODU~IDU

ODU up

30m

ODU down

20m

Level difference between IDU~IDU

8m

Longest

piping length

Level

difference

between

IDU~ODU

The IDU to the

nearest branch

pipe

The first branch

joint to the farthest

indoor unit

Level differece

between IDU~IDU

PQE & XYE, just only one group of communication wire of PQE,
achieved both of communication for indoor & outdoor unit and
network.
Reversible communication, central controller can be connected
from indoor side or outdoor side as you wish.

P Q E

P Q E

P Q E

P Q E

P Q E

X Y E

X Y E

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Summary of Contents for VRFPLUS CSCMA Series

Page 1: ...VRF CSCMA SERIES 220V 1Ph 60hz ETL SERVICE MANUAL ...

Page 2: ...CSCMA APH 6 SM1907A R410AAll DC Inverter Mini VRF Contents Part 1 General Information 1 Part 2 Specifications Performance 10 Part 3 Installation 53 Part 4 Troubleshooting 65 ...

Page 3: ...R410AAll DC Inverter Mini VRF CSCMA APH 6 SM1907A ...

Page 4: ...CSCMA APH 6 SM1907A R410A All DC Inverter Mini VRF General Information 1 Part 1 General Information 1 Product Lineup 2 2 Features 3 3 Indoor Units Lineup 7 ...

Page 5: ...body Inch mm Net Gross weight lbs kg Power supply CSCMA APH004 6SB Width 42 21 64 1075 Height 38 1 32 966 Depth 15 19 32 396 171 8 187 4 78 85 220V 1 60Hz CSCMA APH005 6SB Width 35 7 14 900 Height 52 1 4 1327 Depth 15 3 4 400 209 4 233 7 95 106 220V 1 60Hz CSCMA APH006 6SB 209 4 233 7 95 106 220V 1 60Hz CSCMA APH007 6SB 224 9 249 1 102 113 220V 1 60Hz ...

Page 6: ...requiring heating and cooling of up to 7 zones with one outdoor unit Such as villa restaurant school etc Clima offers a variety of indoor unit more than 100 models of 15 types Capacity ranges are from 1 8kW to 16kW It is full compliance with residential and light commercial place Our systems can operate up to 130 of capacity which allows any system to be designed to the customers and applications ...

Page 7: ...gn Optimally design fan shape and new designed discharge air grille and air deflector making higher air volume and lower operation sound 2 5 Quick warm up cool down design and less temperature fluctuation Utilizing the inverter compressor benefits the system can reach full load quickly and shorten warm up or cool down time for an immediate comfortable air solution Less temperature fluctuation will...

Page 8: ...ralized control by simply connecting to outdoor units Longest piping length Level difference between IDU ODU The IDU to the nearest branch pipe The first branch joint to the farthest indoor unit Level differece between IDU IDU PQE XYE just only one group of communication wire of PQE achieved both of communication for indoor outdoor unit and network Reversible communication central controller can b...

Page 9: ...un in cooling mode at any condition so it is very easy for you to charge refrigerant to the system when it needs to be done The self diagnosis function detects malfunctions in major locations in the system and displays the type of malfunction and location This allows service and maintenance to be performed more efficiently 2 14 Space saving The Mini VRF units are more compact resulting in signific...

Page 10: ...400 56 19100 71 24200 80 27300 90 30700 100 34100 112 38200 140 42600 Capacity 100W Capacity Btu h Duct unit Medium static pressure duct High static pressure duct 22 7500 28 9600 36 12300 45 15400 56 19100 71 24200 80 27300 90 30700 112 38200 140 42600 160 54600 Capacity 100W Capacity Btu h Wall mounted Ceiling Floor AHU vertical unit 22 7500 28 9600 36 12300 45 15400 53 18084 56 19100 71 24200 80...

Page 11: ... Floor standing exposed console 22 28 36 45 56 71 80 90 112 140 160 Note If ODU connect only one IDU the capacity of IDU should be not more than ODU If ODU connect more than one IDU the capacity of each IDU should be not more than 8kW for refrigerant uniform distribution Due to continuous improvement specifications are subject to change without prior notice ...

Page 12: ...ni VRF Specifications Performance 9 Part 2 Outdoor Units 1 Specifications 10 2 Dimensions 13 3 Service Space 14 4 Piping Diagrams 15 5 Wiring Diagrams 16 6 Capacity Tables 19 7 Electric Characteristics 51 8 Sound Levels 51 9 Operation Limits 52 ...

Page 13: ...6 870 630 Outdoor fan motor Model WZDK170 38G 1 WZDK100 38G Type DC motor DC motor Brand Panasonic Panasonic Insulation class E E Safe class IP23 IP23 Input W 200 2 x 100 Output W 170 2 x 85 Rated current A 1 6 2 x 0 9 Capacitor uF Speed r min 820 800 Outdoor fan Material ASG20 ASG20 Type Axial fan Axial fan Diameter in mm 22 560 20 508 Height in mm 6 11 16 170 6 11 16 170 Outdoor coil Number of r...

Page 14: ...8 100 Max difference in level ft m 26 8 26 8 Connection wiring Power wiring mm2 3 core x 4 0 3 core x 4 0 Signal wiring mm2 3 core shielded wire x 0 75 3 core shielded wire x 0 75 Ambient temperature Cooling 5 109 4 15 43 Heating 5 80 6 15 27 Model CSCMA APH006 6SB CSCMA APH007 6SB Code 220095101890 220095102980 Power supply V Ph Hz 220V 1 60Hz 220V 1 60Hz Cooling Capacity kW 14 15 5 Btu h 47800 5...

Page 15: ...Lbs kg 209 4 233 7 95 106 224 9 249 1 102 113 Refrigerant Type R410A R410A Charged volume Lbs kg 8 6 3 9 8 6 3 9 Throttle type Electronic expansion valve Design pressure MPa 4 4 2 6 Refrigerant piping Liquid side in mm Ф3 8 Ф9 53 Ф3 8 Ф9 53 Gas side in mm Ф5 8 Ф15 9 Ф3 4 Ф19 1 Total Pipe Length Actual ft m 328 100 328 100 Max difference in level ft m 26 8 26 8 Connection wiring Power wiring mm2 3 ...

Page 16: ...M1907A R410AAll DC Inverter Mini VRF Specifications Performance 13 2 Dimensions 10 5kW 12kW 14kW 16kW Unit in mm 38 1 32 966 38 31 32 990 42 21 64 1075 24 9 16 624 13 15 16 354 13 15 64 336 15 19 32 396 14 13 32 366 ...

Page 17: ...6 300 23 5 8 600 11 13 16 300 78 3 4 2000 Wall or obstacle Maintain channel Air outlet Air inlet Air inlet Single unit installation 78 3 4 2000 11 13 16 300 Parallel connect the two units or above Parallel connect the front with rear sides 23 5 8 600 78 3 4 2000 19 11 16 500 118 1 18 3000 118 1 18 3000 11 13 16 300 ...

Page 18: ...receiver It is used to store the liquid refrigerant and oil it can protect the compressor from liquid hammer 4 way valve Closed in cooling mode and open in heating mode Electronic expansion valve The opening is of the valve is regulated according to the discharge air temperature of compressor used to regulating refrigerant flow High Pressure Switch When the discharge pressure of compressor is 4 2M...

Page 19: ...R410AAll DC Inverter Mini VRF CSCMA APH 6 SM1907A 16 Specifications Performance 5 Wiring Diagrams For 10 5kW ...

Page 20: ...CSCMA APH 6 SM1907A R410AAll DC Inverter Mini VRF Specifications Performance 17 For 12 14 16kW ...

Page 21: ...table users can purchase the Central control montior when necessar y please contract with local supplier in details Power 380 415V 50Hz 3 Phase 380 415V 60Hz 3 Phase 208 230V 60Hz 3 Phase Single phase indoor unit Wire controller The reserved wire control function is indicated in broken line table users can purchase the wire controller when necessary To wire controller Display board WHITE BLUE BLAC...

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Page 54: ...7 253 31 25 30 40 13 5 2 0 1 2 0 9 CSCMA APH006 6SB 60 208 230 187 253 36 25 30 40 13 5 2 0 1 2 0 9 CSCMA APH007 6SB 60 208 230 187 253 36 25 30 40 16 1 2 0 1 2 0 9 Remark TOCA Total Over current Amps A MFA Max Fuse Amps A RLA Rated Locked Amps A OFM Outdoor Fan Motor FLA Full Load Amps A kW Rated Motor Output KW 9 Sound Levels Model Noise level dB A CSCMA APH004 6SB 57 CSCMA APH005 6SB 57 CSCMA A...

Page 55: ...ient temperature is lower than 15o C 5o F or higher than 43 o C 109 4 o F the unit will stop for protection control 10 5 0 5 10 15 20 25 30 35 40 45 10 15 20 25 30 35 20 15 10 5 0 5 10 15 20 25 30 35 10 15 20 25 30 35 5 Cooling Outdoor temperature æ DB Outdoor temperature æ WB Heating Indoor temperature WB Range for continuous operation Range for intermittent operation Range for intermittent opera...

Page 56: ... VRF 53 Installation Part 3 Installation 1 Precautions 54 2 Accessories 55 3 Outdoor unit installation 55 4 Piping installation 57 5 Electric Wiring Installations 61 6 Outdoor Unit Wiring 63 7 Test Running 64 8 Precautions on Refrigerant Leakage 64 ...

Page 57: ...r than the specified refrigerant into the refrigeration cycle If air or any other has is mixed in refrigerant the gas pressure in the refrigeration cycle becomes abnormally high and it may resultantly causes pipe burst and injuries on persons Do not modify this unit by removing any of the safety guards or by by passing any of the safety inter lock switches Exposure of unit to water or other moistu...

Page 58: ...d to a strong wind such as the upper stairs or rooftop of a building apply the windproof measures referring to the following examples Install the unit so that its discharge port faces to the wall of the building Keep a distance 2000mm 78 7 inch or more between the unit and the wall surface Supposing the wind direction during the operation season of the discharge port is set at right angle to the w...

Page 59: ...ct two units or above Parallel connect the front with rear sides All the pictures in this manual are for explanation purpose only They may be slightly different from the air conditioner you purchased depend on model The actual shape shall prevail 1 97ft 60c m Fix with bolt 0 98ft 300mm 1 96ft 600mm 0 98ft 300mm 6 56ft 2000mm Wall or obstacle Maintain channel Air outlet Air inlet Air inlet 6 56ft 2...

Page 60: ...ould from inside to outside and then piping and wiring through this Pay attention to the piping the fat connecting pipe should out from the largest hole otherwise the pipes will be rubbed Please do the moth proofing for the knocked out hole to avoid the pest processing into and destroy the components 4 2 Allowable length and level difference of refrigerant pipe Permitted value Piping Pipe Length T...

Page 61: ...to the nearest branch Maximum pipe equivalent length Pipe Length from the first branch to the furthest IDU Level difference bwtween IDU IDU Level difference between ODU ODU Indoor unit a N1 3 N 5 N 6 N 2 N 4 N Outdoor unit A B D E C b c e f d 1 L 2 L 5 L 3 L 4 L Pipe Length IDU to the nearest branch Pipe Length from the first branch to the furthest IDU Level difference bwtween IDU IDU Maximum pipe...

Page 62: ... 4in 6 35mm Flaring nut Duct type 5 6 16 5 8in 15 9mm Flaring nut 3 8in 9 53mm Flaring nut Ceiling Floor 3 6 4 5 1 2in 12 7mm Flaring nut 1 4in 6 35mm Flaring nut Ceiling Floor 5 6 16 5 8in 15 9mm Flaring nut 3 8in 9 53mm Flaring nut Note The maximum length of the branch pipe should not be longer than 50ft 15m Table 2 Indoor unit main pipes selection L1 L5 Total capacity of downstream indoor units...

Page 63: ... units Wash the piping with high pressure nitrogen never use refrigerant of outdoor unit 4 5 Airtight Test Charge pressured nitrogen after connecting indoor outdoor unit piping to do airtight test Cautions 1 Pressured nitrogen 4 3MPa 44kg cm3 for R410A should be used in the airtight test 2 Tighten high pressure low pressure valves before applying pressured nitrogen 3 Apply pressure from air vent m...

Page 64: ...imultaneously on or off otherwise system life will seriously effect and appear the situation not to solve 4 The communication line between indoor units and outdoor units please use 3 core shielded wiring while don t use the multi core wiring without shielded affect for the interference is reduced each other 5 Purchased wiring parts and materials should be in compliance with the local and national ...

Page 65: ...ed engineering is prohibited to bind together with refrigerant piping It is necessary to pass through wire tube and be distributed separately and the gap between control line and power wire should be 500mm at least 3 When distributing wiring by passing through pipe the following should be paid attention to 1 Metal wire tube could be used in indoor and outdoor but it is not suitable to the place wi...

Page 66: ...l engineer for wiring Complete wiring according to national electrical standards To reduce interference use a three core shielded twisted pair as the outdoor unit signal cable Do not use a multi core cable Incorporate the outdoor unit and indoor unit connection wiring system and refrigerant pipe system for the same system The power supply electric leakage protectors and manual switches of the indo...

Page 67: ...tial action can be taken on time Refrigerant critical thickness 0 44 kg m3 for R410A Confirm the critical thickness through follow steps and take necessary actions 1 Calculate the sum of the charge volume A kg Total Refrigerant volume of 10HP factory refrigerant volume super addition 2 Calculate the indoor cubage B m3 as the minimum cubage 3 Calculate the refrigerant thickness Counter measure agai...

Page 68: ...i VRF Troubleshooting 65 Part 4 Troubleshooting 1 PCB ports instructions 66 2 PCB parts instructions 68 3 Function setting dials witches instructions 70 4 LED on PCB instructions 71 5 PCB Introduction 72 6 Error code table 73 7 Troubleshooting 74 ...

Page 69: ...y of outdoor fan port DC380V 15V 14 CN30 Communication port between indoor units DC2 5 5V 15 CN29 Communication port between outdoor unit and indoor unit DC2 5 5V 16 CN13 Signal input port of system low pressure high pressure detect switch DC0 5V in dynamic change 17 CN8 Discharge temperature detection port of the inverter compressor DC0 5V in dynamic change 18 CN9 Outdoor temperature condenser co...

Page 70: ...port between indoor units DC 5V 15 CN10 Communication port between indoor unit and outdoor unit DC 5V 16 Signal input port of AC input current 17 CN1 Detect port of radiation fin DC 5V 18 CN6 Signal input port of system low pressure detect switch 19 CN7 Signal input port of system high pressure detect switch 20 Discharge temperature detect port of converter compressor DC 5V 21 CN8 Detect port of a...

Page 71: ...ture Actual value 8 T5 discharge temperature Actual value if it is more than one hundred it will be only display the hundreds digit and the tens digit 9 Reserved 10 EXV opening degree Actual Value Display value 8 11 Current value Actual value 12 Voltage AD value Actual value 13 T2 average temperature Actual value 14 Total quantities of the indoor units Actual value 15 The quantities of the operati...

Page 72: ...red capacity of the indoor unit 5 The required capacity of the revised outdoor unit 6 T3 piping temperature Actual value 7 T4 environment temperature Actual value 8 T5 discharge temperature Actual value if it is more than one hundred it will be only display the hundreds digit and the tens digit 9 Reserved 10 EXV opening degree Actual Value Display value 8 11 Current value Actual value 12 Voltage A...

Page 73: ...n code it will be display nn 17 Display 3 Function setting dial switches instructions 10 5 kW SW3 definition Auto Addressing Dial SW3 1 ON Obtain network address automatically OFF Obtain network address manually 2 ON Revocation indoor unit network address OFF 12 16 kW SW 1 definition Auto Addressing Dial SW 1 1 ON Obtain network address automatically OFF Obtain network address manually 2 ON Revoca...

Page 74: ...s to the following picture LED1 Malfunction indicator lamp of inverter module The lamp will be off if the system running is normal And it will be on if the inverter module is faulty and the error code will display on digital tube LED2 Running indicator lamp of inverter module The lamp will be on if the system running is normal LED 1 Red LED 2 Green LED 1 Red LED 2 Green IR341 chip ...

Page 75: ...l DC Inverter Mini VRF CSCMA APH 6 SM1907A 72 Troubleshooting 5 PCB Introduction 10 5 kW 12 16kW IPM Module Drive Board Main PCB Filter Board PFC Module PFC Module IPM Module Drive Board Main PCB Filter Board ...

Page 76: ...f 10 5 kW E8 12 16 kW P1 High pressure protection All models P2 Low pressure protection All models P3 Compressor current protection All models P4 Compressor discharge temperature protection All models P5 Condenser T3 high temperature protection All models P6 Modules protection All models PE Evaporator high temperature protection 10 5 kW P7 12 16 kW P8 Typhoon protection All models L0 Module malfun...

Page 77: ...2 IR341chip is on the IPM module LED display H0 E3 Communication malfunction between main PCB chip and IR341 chip Whether the LED indicator on the drive board flash normally Replace the drive board NO Whether the signal wiring between the module board and drive board is connected normally Connect wire again NO YES Disconnect the communication wire between IPM module board and drive board And check...

Page 78: ...dress 0 1 2 3 4 5 6 7 8 9 Capacity 100W 22 28 36 45 56 71 80 90 112 140 HP 0 8 1 0 1 2 1 6 2 0 2 5 3 0 3 2 4 0 5 0 For example LED displays E2 Communication malfunctions between indoor unit chip and outdoor unit chip Check the communication wire sequence is correct or not Connect the wire again NO Check whether there is disconnection YES Replace NO Check whether the three cored shielded wire is us...

Page 79: ... between P and Q of outdoor unit Installation refers to the following picture Note Communication wires should be shield wire and indoor units should be connected in series 7 3 E4 Pipe temperature T3 ambient temperature T4 sensor malfunction for all models Case There is no display on PCB of one system and the problem still exists after replacing PCB Voltage values on measuring plate such as 220V 5V...

Page 80: ...y bolt as follows 7 4 E5 Voltage protection malfunction for all models T4 sensor is worn out and connected with sheet metal After being reconnected the system becomes normal LED displays E5 Voltage protection malfunction Whether the input voltage is 180 260V NO Replace the filter board and check whether the unit can operate normally Check the power supply YES Replace the main PCB YES OK NO ...

Page 81: ...ng diagram to check whether the DC fan wiring is correct or not NO Connect again YES Check whether power source and voltage of DC fan are normal Check whether the voltage with black red terminal connected to the DC fan plug is 277 354V when standby 是 YES Check the Voltage between DC fan motor s white terminal and black terminal is 15V when standby NO Replace IPM module Replace the main PCB YES Whe...

Page 82: ...gher than normal value compressor makes noise pressure meter do not display steady LED displays E7 Discharge sensor malfunction Check whether discharge temperature sensor s head is inside the sleeve or its wiring is connected to the main PCB properly NO Connect again YES Check whether the discharged sensor is normal NO Replace discharge sensor YES Check the operation conditions of the unit meets t...

Page 83: ...alfunction E9 is for 10 5kW E0 is for 12 16kW The malfunction may be caused by two reasons 1 The EEPROM is not inserted well 2 Outdoor main board is broken LED display E9 E0 EEPROM malfunction Replace outdoor main PCB Check whether the EEPROM is inserted well Insert the EEPROM well NO YES ...

Page 84: ...ient temperature is higher than the unit s operating condition when heating mode YES Belongs to system normal protection NO Check whether the refrigerant volume of the system is added according to the requirement and check if the refrigerant leaks YES Connect the pipe again check leakage insure the pressure add the refrigerant NO Check whether the condenser is blocked YES Rectify the pipe system R...

Page 85: ...e the high pressure switch YES Check whether the cooling system operates normally Replace the main PCB NO Whether high pressure of the system is too high YES Stop the system NO Whether side air duct of outdoor unit meets the standard NO Rectify the air duct YES Whether the heat exchanger needs cleaning YES Clean it NO Whether the pipeline is blocked YES Rectify the pipeline Whether the throttle pa...

Page 86: ...g system can work as normal YES NO Check whether the outdoor ambient temperature is too low YES Stop the unit NO Whether refrigerant system leaks YES Leakage detecting add nitrogen or refrigerant into the system si si will sound evidently if leaks heavily Use soap water the combination of water and detergent or electronic detector to detect if leaks slightly Whether the refrigerant pipe is blocked...

Page 87: ...power wire is more than 30A Check cooling system is normal or not YES Check whether the outdoor ambient temperature is too high YES Stop the unit NO NO Check whether the outdoor unit ventilates well YES Make the outdoor unit ventilates well NO Whether the heat exchanger needs cleaning or not YES Clean heat exchanger NO If the refrigerant pipe is blocked or not YES Remove the refrigerant pipe and t...

Page 88: ...emperature of the compressor Check whether the discharged temperature of the compressor is higher than 115 C NO Check whether the compressor discharged temperature sensor connects with PCB correctly according to the wiring diagram YES Check whether resistance of compressor discharged temperature sensor is correct or not NO Connect correctly again YES Replace outdoor PCB Whether the discharged temp...

Page 89: ...her condenser temperature is higher than 62 degrees for 3 seconds NO Check whether the resistance of condenser temperature sensor is correct YES Replace the outdoor main PCB NO Replace the temperature sensor YES Whether outdoor temperature is too high higher than 43 degrees or not Replace outdoor PCB NO Whether heat exchanger needs cleaning NO If refrigerant pipe is blocked or not Clean heat excha...

Page 90: ...LED indicators flashes Inverter module LED indicators Errors indicated on LED LED flashing pattern Corresponding error Flashes 8 times and stops for 1 second then repeats L0 Inverter module protection Flashes 9 times and stops for 1 second then repeats L1 DC bus low voltage protection Flashes 10 times and stops for 1 second then repeats L2 DC bus high voltage protection Flashes 12 times and stops ...

Page 91: ...rter module is 310V DC When the fan motor is running the voltage between P and N terminal on inverter module is 380V DC 7 14 3 L0 L4 troubleshooting Condition 1 L0 or L4 error appears immediately when the outdoor unit is power on L0 L4 Inverter module is failed1 Yes Replace the inverter module Notes 1 Measure the resistance between PU PW PV UN VN WN on inverter module If the resistances are infini...

Page 92: ...d 3 To check for compressor The normal resistances of the inverter compressor are 0 7 1 5Ω among U V W and infinite between each of U V W and ground If any of the resistances differ from these specifications the compressor has malfunctioned If there is another unit nearby that is operating normally its electric control box can be used to check the compressor Disconnect the power wires of the compr...

Page 93: ...Inverter module is over current2 Yes Replace the compressor No Replace the inverter module Notes 1 Excess refrigerant causes discharge temperature to be lower than normal discharge pressure to be higher than normal and suction pressure to be higher than normal 2 Use clip on ammeter to measure the compressor current if the current is normal indicates the inverter module is failed if the current is ...

Page 94: ...ier Method 1 measure the resistance between any two terminals of the 5 terminals if any of the resistance is nearly 0 the three phase bridge rectifier is failed Method 2 dial the multimeter to diode gear 1 Put the red pen in negative pole of DC power output terminal terminal 5 then put black pen in terminal 1 2 and 3 in turn The voltage should be around 0 378V If the voltage is 0 the three phase b...

Page 95: ...compressor operates more than 20Hz L1 L2 Relay on main PCB is open Yes Replace the main PCB or transformer No PFC on inverter module is failed2 Yes Replace the inverter module Notes 1 If the fan motor is running and the DC voltage between terminal P and N on inverter module is not 380V indicates the PFC is failed ...

Page 96: ...otection Check whether average temperature of evaporator is higher than 63 degrees for 50 seconds or not NO Check whether the resistance of evaporator temperature sensor is correct YES Replace outdoor main PCB NO Replace temperature sensor YES If indoor temperature is too high or not exceeds the using range of the unit Replace outdoor main PCB NO Whether the heat exchanger needs cleaning NO Whethe...

Page 97: ...ls LED displays P8 Typhoon protection YES Belongs to normal protection When air conditioner is standby or in malfunction stopping status check if there is strong air blows the fan phenomenon NO Check whether the fan motor is normal YES Replace outdoor main PCB or transfer board of the fan NO Replace fan motor ...

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