Daikin RZQG71L9V1, Service Manual

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ESIE15-13C Troubleshooting by Remote Controller
Service Diagnosis 155
4.23 Outdoor Unit PCB Abnormality
Remote
Controller
Display
L1
Applicable
Models
RZQG
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 MP-PAM series capacitor overvoltage sensor.
Error Decision
Conditions
 When over-current is detected at the time of waveform output during operating the
compressor

When the current sensor error during synchronized operation
 When overvoltage occurs in MP-PAM
 In case of IGBT error

In case of faulty in E
2
PROM
Supposed
Causes

External factor (Noise, etc.)

Defective outdoor unit fan motor
 Broken fuse
 Disconnection of compressor

Defective outdoor unit PCB (A1P)
· IPM failure
· Current sensor failure
· MP-PAM failure
· Defective IGBT or drive circuit
· Defective inverter E
2
PROM