Compressor Overcurrent - Daikin VRV RXYMQ-A Series Service Manual

Troubleshooting by Error Code

5.43 Compressor Overcurrent

Applicable All outdoor unit models
Models
L8
Error Code
Method of Error
Detect current flowing through the power transistor.
Detection
Error Decision
(1) The secondary-side inverter current exceeds A (A) for a period of 5 consecutive seconds.
Conditions (2) The secondary-side inverter current exceeds B (A) for a period of 260 consecutive seconds.
Trigger point
2Y350APAX2N
2Y420AVAY1N
Supposed  Compressor overloaded
Causes  Wiring disconnection in compressor coil
 Disconnection of compressor wiring
 Defective outdoor unit main PCB (RXYMQ4AVMK)
 Defective inverter PCB (RXYMQ4-6AYFK)
Troubleshooting
Power OFF
226
Compressor model A (A)
22.1
22.5
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the stop valve open?
YES
Check for the leads of the
compressor.
• For compressor M1C
Are the
leads of the
compressor normal?
YES
Are
wiring and wire
connections to the
compressor
normal?
YES
A
B (A)
22.1
18.6
NO
NO
NO
SiME332106E
Open the stop valve.
Replace the leads of the
compressor.
Rectify the wiring and
wire connections.
Part 6 Service Diagnosis