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_TROUBLE SHOOTING GUIDE BOOK _
13.2 Failure Cause
13.3 Precautions of Replacement
13.3 Check Point after Replacement
1. High voltage (T-N more than 484V, N phase wiring fault) → CH50
2. Rainwater inflow by Control box / Front Panel / Service port open, Control box screw loosening
3. Part short by foreign substance
4. Defective PCB / Diode / Resistance / Capacitor / Regulator
1. Be sure to use the main PCB suitable for the model (Check P/No)
2. Be sure to turn off the power and wear insulated gloves before touching the PCB.
3. Use box or bag only for PCB.
4. If on-boarding is required after replacement, check the program and EEPROM C/Sum (especially when
using an alternate Main PCB)
1. Check whether there is any abnormality when the cycle is stabilized at cooling or heating mode.
2. Check current Hz control according to target Hz
3. Check that the target high / low pressure is reached
14. External PCB
14.1 Failure Judge Method
1. Error code check
Error Code Error diagnosis
CH05, CH53, CH104,
CH237, CH238
· Even after checking the connection condition of indoor and outdoor
communication lines (shield wire, unshield wire)
CH32, CH33, CH34,
CH35, CH36, CH41,
CH42, CH43, CH44,
CH45, CH46, CH47,
CH113,
CH114, CH115, CH116,
CH151, CH153, CH154
· Even after replace each temperature sensor, pressure sensor, and
valve replacement.
CH145
· Even after checking Main - External PCB communication
harness(6pin, Blue) connection condition
2. External PCB check
16. External PCBA
1.1 불량 판단 방법
1.2 주요 불량 원인
· 고전압 인가 (T-N 494 V 이상, N상 오결선 시 CH50 발생)
· 물 침투(컨트롤박스 프론트 판넬 열림, 서비스창 열림, 컨트롤박스 스크류 풀림 으로 인한 빗물 유입)
· 이물질 침투에 의한 부품 Short, Open
에러 코드 불량여부 판단
CH05, CH32, CH33, CH34, CH35, CH41, CH42,
CH43, CH44, CH45, CH46, CH47, CH53, CH104,
CH113, CH114, CH115, CH116, CH145, CH151,
CH153, CH154, CH237, CH238
•
실내외기간 통신선(실드선, 비실드선) 체결 상태 확인 후 에도 동일 Error발생
CH237, CH238)
• 각 온도센서, 압력 센서, 밸브 교체 후에도 동일 Error 발생
(CH32, CH33, CH34, CH35, CH36, C
CH42, CH43, CH44, CH45, CH46, CH47, CH113, CH114, CH115, CH116, CH151, CH153, CH
• Main-External간 연결 통신 Harness(6pin, Blue) 결선 여부 확인 후에도 동일 Error 발생 (CH145)
Reserved
EEV 삭제
Main
EEV1
Main
EEV2
SC
EEV
VI
EEV1
VI
EEV2
Snow
Sensor
Low Pressure
Sensor
Oil Level
IN V1
Oil Level
IN V2
Humidity
Sensor
High Pressure
Sensor
D VI
EEV
IN V2
P/SW
삭제
Reserved
Power
Cycle
Commu-
nication
Digital
Sensor
On-boarding
Receiver
Out
HEX
High
Accum
Oil
IN J
Suction
Receiver
In
HEX
Low
IN V2
Heater
IN V1
Heater
IN V1
V
4way1
OIL_
BAL_V1
DDC
ACT_
OIL 1
4way2
ACT_
OIL 2
Active
Path
Reserved1
ODU.IDU.Dry contact
Dohug
Reserved2
Air Temp.
Liquid Pipe Temp.
Heat Exchanger Upper
SC Discharge
IN V1 Discharge
Heat Exchanger
Suction Temp.
Heat Exchanger Lower
SC Suction
D VI Suction
D VI Discharge
IN V2 Discharge
ID U.B ID U.A DRY.1 DRY.1 GND 12V
MICOM
AC Load
Comm. Connetor
Temp./Pres-
sure Sensor
Basic PartBasic PartBasic PartBasic Part
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