Mitsubishi Electronics PUZ-A42NHA2-BS, PUZ-A30NHA2 Case Judgment and action Outdoor fan motor

Page 39

Error Code

Abnormal point and detection method

Case

Judgment and action

 

Outdoor fan motor

1 Failure in the operation of

1 Check or replace the DC fan motor.

 

The outdoor fan motor is considered to be

the DC fan motor

 

 

abnormal if the rotational frequency of fan

2 Failure in the outdoor circuit

2 Check the voltage of the outdoor circuit

 

motor is abnormal when detected during

controller board

controller board during operation.

 

operation.

 

3 Replace the outdoor circuit controller

 

Fan motor rotational frequency is abnormal

 

board. (when the failure is still indicated

U8

if;

 

even after performing the remedy 1

• 100 rpm or below detected continuously

 

above.)

(4400)

 

for 15 seconds at 20:[68˚F] or more

 

 

 

 

 

 

outside air temperature

 

 

 

• 50 rpm or below or 1500 rpm or more

 

 

 

detected continuously for 1 minute.

 

 

 

 

 

 

Overvoltage or voltage shortage and

1 Decrease of power supply volt- 1 Check the facility of power supply.

 

synchronous signal to main circuit

age

2 Correct the wiring (U·V·W phase) to com-

 

Abnormal if any of followings are detected

2 Disconnection of compressor

pressor. Refer to 10-9 (Outdoor power circuit

 

wiring

board).

 

during compressor operation;

3 Disconnection or loose con-

3 Check CN52C wiring.

 

• Decrease of DC bus voltage to 310V

nection of CN52C

 

 

• Instantaneous decrease of DC bus volt-

4 Defective PFC module of out- 4 Replace outdoor power circuit board.

 

age to 200V

door power board (A12, 18,

(A12, 18, 24N only)

 

• Increase of DC bus voltage to

24N only)

 

 

A12, 18, 24N : 420V

5 Defective ACT module (A30,

5 Replace ACT module. (A30, 36, 42N only)

 

A30, 36, 42N : 400V

36, 42N only)

 

 

• Decrease of input current of outdoor unit

6 Defective ACT module drive

6 Replace outdoor power circuit board.

 

to 0.5A only if operation frequency is

circuit of outdoor power circuit

(A30, 36, 42N only)

 

more than or equal to 40Hz or compres-

board (A30, 36, 42N only)

 

 

sor

7 Disconnection or loose con-

7 Check CNAF wiring. (A30, 36, 42N only)

U9

current is more than or equal to 5A.

nection of CNAF (A30, 36, 42N

 

• Abnormal power synchronous (zero

only)

 

(4220)

 

cross) signal

8 Defective 52C drive circuit of

8 Replace outdoor noise filter circuit board.

 

 

• PFC error (overcurrent) when the current

outdoor noise filter circuit

 

 

peak of input current increase A12, 18,

board

 

 

24N: 47A (peak)

9 Disconnection or loose

9 Check CN5 wiring on the outdoor power

 

 

connection of CN5 on the

circuit board.

 

 

outdoor power circuit board

Refer to 10-9.

 

 

0 Disconnection or loose

0 Check CN2 wiring on the outdoor power

 

 

connection of CN2 on the

circuit board.

 

 

outdoor power circuit board

Refer to 10-9.

 

Compressor overcurrent interruption

1 Stop valve is closed.

1 Open stop valve.

 

(When compressor locked)

2 Decrease of power supply

2 Check facility of power supply.

 

Abnormal if overcurrent of DC bus or

voltage

 

 

compressor is detected within 30 seconds

3 Looseness, disconnection or

3 Correct the wiring (U·V·W phase) to

UF

after compressor starts operating.

converse of compressor wiring

compressor.

(4100)

 

connection

Refer to 10-9 (Outdoor power circuit board).

 

4 Defective compressor

4 Check compressor.

 

 

 

 

 

Refer to 10-6.

 

 

5 Defective outdoor power board 5 Replace outdoor power circuit board.

 

 

 

 

 

Current sensor error

1 Disconnection of compressor

1 Correct the wiring (U·V·W phase) to

 

• Abnormal if current sensor detects –1.5A

wiring

compressor. Refer to 10-9 (Outdoor power

 

to 1.5A during compressor operation.

 

circuit board).

 

(This error is ignored in case of test run

2 Defective circuit of current

2 Replace outdoor power circuit board.

 

mode.)

sensor on outdoor power

 

UH

w This error is ignored in case of test run

circuit board

 

(5300)

mode.

3 Decrease of power supply

3 Check the facility of power supply.

 

• It’s abnormal for 38A the input current or

voltage

 

 

10 seconds continuous 34A or more.

 

 

39

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Contents Parts Catalog OCB429 ContentsIndoor Unit Reference ManualAlways Observe for Safety Safety PrecautionAdditional refrigerant charge When charging directly from cylinderR22 Features PUZ-A18NHA2 PUZ-A18NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BSPUZ-A42NHA2 PUZ-A42NHA2-BS PUY-A42NHA2 PUY-A42NHA2-BS PUZ-A18NHA2 PUZ-A24NHA2 PUZ-A30NHA2 PUZ-A36NHA2 PUZ-A42NHA2 SpecificationsPUY-A18NHA2-BS PUY-A24NHA2-BS Data Compressor Technical DataPUZ-A18NHA2-BS Noise Criterion CurvesHeat pump Standard Operation DataPKA-A12GA PKA-A18GA PKA-A24FA PKA-A30FA PKA-A36FA PLA-A42BA Cooling onlyUnit mminch Outdoor UnitExample of Notes 662-5/8 Air outlet Service SpaceNET Adapter Wiring DiagramNET Adapter PUZ-A24NHA2 PUZ-A24NHA2-BS PUY-A24NHA2 PUY-A24NHA2-BSWUse copper supply wires TABU/V/W System Simultaneous twin system Wiring SpecificationsOFF Separate Indoor UNIT/OUTDOOR Unit Power SuppliesIndoor Outdoor Connecting Cable Refrigerant address NET address Control Remote Controller NET Wiring MethodNET wiring NET address settingRefrigerant address setting Regulations in address settingsWay valve solenoid coil Heating on Cooling OFF Refrigerant System DiagramPUZ-A18NHA2 PUZ-A18NHA2-BS PUZ-A42NHA2 PUZ-A42NHA2-BSPUY-A42NHA2 PUY-A42NHA2-BS PUY-A12/18NHA2 PUY-A12/18NHA2-BSStart and finish of test run Refrigerant recovering pump downBefore test run TroubleshootingTroubleshooting Check Point Under Test RUNOperating procedures Symptoms in test run mode Cause Remote Controller DisplayContents of inferior phenomena Test run for wireless remote controller HOW to Proceed SELF-DIAGNOSIS When a Problem Occurs During OperationSelf-Diagnosis During Maintenance or Service ON/OFF Remote Controller DiagnosisCase of trouble during operation Malfunction-diagnosis method by wireless remote controllerMalfunction-diagnosis method at maintenance service ProcedureU9,UH Cndc Error Code Abnormal point and detection method Case63L connector open SELF-DIAGNOSIS Action TableIndoor/outdoor unit connector Error CodeCase Judgment and action 63H connector open Connector open63H worked Case Judgment and action High pressure High-pressure switchHigh discharging temperature Abnormalities detected while unit is operatingCase Judgment and action Open/short circuit of discharge Temperature thermistor TH4Temperature of heatsink Power moduleCase Judgment and action Outdoor fan motor Synchronous signal to main circuitWhen compressor locked Current sensor errorCase Judgment and action Low pressure 63L worked Remote controller transmissionErrorE0/signal receiving errorE4 Remote controller control boardNon defined error code Case Judgment and action Remote controller transmissionErrorE3/signal receiving errorE5 Error Signal receiving errorCase Judgment and action Address duplicate definition NET communication errorCase Judgment and action Pipe temperature Hardware error of transmissionTo the next Lossnay From the previousFresh Master MasterTroubleshooting by Inferior Phenomena VCTF, VCTFK, CVV CVS, VVR, VVF, VCTPhenomena Factor Countermeasure Melans YES Please WaitMiswiring, breaking Outdoor power circuit boardPower supply To the outdoor unit Check the breaker Outdoor connecting wireBreaking or poor Fix the breaking or poor Indoor/outdoor connecting wire BlinkingDefective indoor Replace the indoor Power board Not lightingCheck if there is breaking Action Table Before repair Frequent calling from customersThis is not a malfunction Phone Calls From Customers How to RespondSometimes This is the sound which is heard when the flow Refrigerant in the air conditioner is switchedWith Blower… With Airflow Direction…There might be a case that Page HOW to Check the Parts END Wiring contact checkPower supply check Remove the connector CNF1 Fuse checkHigh temperature thermistor HOW to Check the ComponentsThermistor feature chart Low temperature thermistors Medium temperature thermistorOutput pulse signal and the valve operation Operation summary of the linear expansion valveLinear expansion valve operation Linear expansion valve A24, 30, 36 How to attach the coil How to detach the coilBe sure to attach the stopper SW4 Emergency operation procedureEmergency Operation Releasing emergency operationOperation data during emergency operation Test Point Diagram LO, no LI, NICNAC1, CNAC2 CN5PUZ-A24NHA2 PUZ-A24NHA2-BS PUY-A24NHA2 PUY-A24NHA2-BS RS1 CN3 CN4 CN5 LD1-LD2DIP-PFC DIP-IPMActm CnafCN3 TABP2/SC-P2Upper side Lower sideL1, L2 OFF Function of SWITCHES, Connectors and JumpersFunction of switches Function Action by the switch operation Effective timingSW9 2Function of connectorSpecial function 50%75% Display function of inspection for outdoor unit 1Check the outdoor fan motor 1Check if stop valves are open Blinking Abnormality of outdoor fan Motor rotational speedDigital indicator LED1 working details Operation indicatorLighting Cancellation of postponement Example When 42500 times 425 100 times Secs 5secs~9999 When it is 100 hours or more, hundreds digit, tens Example When 2450 hours 245 10 hoursSW2 setting Display detail Explanation for display Unit Cooling only Outdoor unit setting informationSingle phase 2 3 phase UnitDegF Fan step on error occurring ~10 Step Example When 130 pulse U9 Error status during the Error Discharge superheat on error occurring ~327 0~182degC SHdSecs Sub cool on error occurring. SC ~234 0~130degC Example When 415 minutes Minute SecsLED Rise of discharge temperatureFixed Hz operation Easy Maintenance FunctionMaintenance Mode Operation Method Switching to maintenance modeTo check the data for each item, repeat steps 5 to Data measurementGuide for Operation Condition Average data Initial Ta=A+B/2 Sensor on all Function SettingUnit Function Setting by the Remote Controller Data of the sensor Ta=C On main remote ControllerMode No.11 Setting No SettingsPLA-BA PCA-GA Press E FAN operation Selecting functions using the wired remote controllerFor modes 15 and higher Specified indoor unitOperating Procedure Operating instructions Flow of function selection procedureMode Selection Function Selection of Remote ControllerFunction selection flowchart FAN Mode VanePress Button for 3 seconds to switch to Maintenance monitorCheck button for 3 seconds to return to maintenance mode Turn on the Monitoring the operation dataRequest Code List Outdoor unit-Control state Code Description For indoor fan pulsation control 100101 Detail Contents in Request CodeActuator output state Request code Error content U9 Request code102 Fan control state Request codeContact demand capacity Request code Outdoor unit --Capacity setting display Request codeOutdoor unit Setting information Request code 103104 Data display See the table on the right Indoor unit Model setting information Request codeIndoor unit Capacity setting information Request code 105Photo Disassembly ProcedurePUZ-A18NHA2 PUZ-A18NHA2-BS Operating Procedure Photos 106Thermistor Outdoor pipe TH3 Removing the thermistor Outdoor 2-phase pipe TH6107 Removing the electrical parts box108 Operating Procedure Photos109 Removing the 4-way valveRemoving linear expansion valve Removing the accumulator Separator Recover refrigerant110 Removing the compressor MCRemoving the fan motor MF1 Operating Procedure Photos & IllustrationRemoving the service panel and top panel 111112 Removing the thermistor Outdoor pipe TH3Thermistor Discharge TH4 Removing the bypass valve coil 113Removing the 4-way valve coil Removing the linear expansion valve coil114 Removing the bypass valveRemoving the reactor ACLA24 115 Removing the reactor DCL A30Remove 2 receiver leg fixing screws 4 Removing the fan motor MF1, MF2 116Remove the service panel. See figure Outdoor pipe 117Remove the top panel. See figure Controller Coil Valve coil 118Are not oxidized Linear expansionDCL Low pressure switch 63L119 Removing the reactor DCL and capacitor CERemove 2 back cover panel fixing screws 5 10

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