Daikin RXL25G2V1B, Service Manual

Page: 104 / 294

SiENBE04-925_A Troubleshooting
Service Diagnosis 89
4.12 Input Overcurrent Detection
Remote Control
Display
E8
Method of
Malfunction
Detection An input overcurrent is detected by checking the input current value with the compressor
running.
Malfunction
Decision
Conditions
„
The following current with the compressor running continues for 2.5 seconds.
Cooling / Heating: Above 9.25 ~ 20 A (Refer to “Input current control” on page 40 for detail.)
Supposed
Causes
„
Defective compressor
„
Defective power module
„
Defective outdoor unit PCB
„
Short circuit
Troubleshooting
Check No.07
Refer to P.121
Check No.08
Refer to P.121
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
∗
An input overcurrent may result from wrong internal wiring. If the wires have been disconnected and
reconnected for part replacement, for example, and the system is interrupted by an input overcurrent,
take the following procedure.
(R11709)
NO
YES
YES
NO
Start operation and measure the
input current.
Check No. 08
Check the discharge pressure.
Check No. 07
Check the installation condition.
Check with the inverter checker (
∗
).
Turn off the power and disconnect
the harnesses U, V, and W.
Turn off the power, and reconnect
the harnesses. Turn on the power
again and start operation.
Replace the outdoor unit
PCB.
Correct the power supply or
replace the PM1.
(Replace the outdoor unit
PCB.) Any LED off?
Input current
flowing above its stop level?
∗
Inverter checker
Part No.: 1225477
SIENBE04-925_A_FRONT.pdf 104 24/02/2011 13:53:56