Dc Voltage / Dc Current Sensor Abnormality - Daikin CTXU25G2V1B Service Manual

Troubleshooting
2.26

DC Voltage / DC Current Sensor Abnormality

H8
Remote
Controller Display
Outdoor Unit LED A5
Display
Method of DC voltage or DC current sensor system abnormality is identified based on the compressor
operation frequency and the input current detected by the product of DC current and DC
Malfunction
voltage.
Detection
Malfunction When the compressor operation frequency is more than 56 Hz (40 class) or 40 Hz (50 class),
and when the input current is less than 0.25 A
Decision
(Input current is below 0.5 A)
Conditions
Supposed
Causes
Troubleshooting
Replace the outdoor unit PCB.
138
55 ( - )
The machine shuts down when the fault occurs 4 times.
Fault counter will be reset to zero if the machine will not stop during accumulated
compressor operation time of 60 min. after restored from fault conditions.
Defective outdoor unit PCB
Defective current transformer
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
SiBE12-908
Service Diagnosis