Troubleshooting by Remote Controller
SiUS281117
Service Diagnosis
151
2.35 Outdoor Unit PCB Abnormality
Remote
Controller
Display
L1
Applicable
Models
RZQ
Method of Error
Detection
Detect error by current value during waveform output before compressor startup.
Detect error by current sensor value during synchronized operation at the time of startup.
Detect error using an SP-PAM series capacitor overvoltage sensor.
Error Decision
Conditions
When overcurrent is detected at the time of waveform output before operating the
compressor
When the current sensor error during synchronized operation
When overvoltage occurs in SP-PAM
In case of IGBT error
Supposed
Causes
Defective outdoor unit PCB (A1P)
IPM failure
Current sensor failure
SP-PAM failure
Defective of IGBT or drive circuit
Defective connection of compressor connector
Defective outdoor unit fan motor
Broken fuse
External factor (Noise, etc.)
