182 183
_TROUBLE SHOOTING GUIDE BOOK _
15.2 Failure Cause
15.3 Precautions of Replacement
15.3 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 Fan motor / 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. Be sure to apply thermal grease.
5. When IGBT screw is fastened, it should be fastened two times.
6. 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. Over current error check (CH29)
4. Check that compressor 1 and 2 are properly connected.
5. Check that the target high / low pressure is reached.
16.1 Failure Judge Method
1. Error code check
Error Code Error diagnosis
- · Checking restart after power reset
CH105
· Even after checking 220V connection condition for Inverter SMPS
power supply
CH76, CH107
· Even after checking DC_Link P, N connection harness assembly
condition (Open, Wrong connection)
CH77, CH106
· Even after replacing fan motor
· Even after fan motor connector misconnection(U, W, V output)
2. Inverter PCB check
16. Fan PCB
18. Fan PCBA
1.1 불량 판단 방법
1.2 주요 불량 원인
· 고전압 인가 (T-N 494 V 이상, N상 오결선) → CH50 발생
· 팬 내부 모터 절연 파괴
· 물 침투(컨트롤박스 프론트 판넬 열림, 서비스창 열림, 컨트롤박스 스크류 풀림 으로 인한 빗물 유입)
· 이물질 침투에 의한 부품 Short, Open
· PCBA 제작 불량
· Diode, 저항, Capacitor, Regulator 등 단품 불량
에러 코드 불량 여부 판단
CH67, CH77, CH79,
CH87, CH105, CH106,
CH107, CH193, CH194
•
전원
Reset
후 재기동 여부 확인
•Inverter SMPS
전원 인가용
220V
결선 여부 확인 후에도 동일
Error
발생
(CH105)
•DC_Link P, N단 연결 Harness 체결 상태확인 후에도 동일불량 발생(CH76, CH107)
•FAN Motor 교체 후에도 동일 불량 발생 (CH77, CH106)
•FAN 출력 선 U, V, W 체결 상태 확인 후에도 동일불량 발생(CH77, CH106)
MICOM
Debug
PCB 간 통신 및
전원 15 V 입력
15V Comm.
Comm..
DCLINK
IPM
Fan1 U, V, W Output
Fan2 U, V, W Output
On-boarding
Basic PartBasic PartBasic PartBasic Part
To Next Page
Loading...
