Input Overcurrent Detection - Daikin FTXS20G2V1B Service Manual

Troubleshooting

4.12 Input Overcurrent Detection

E8
Remote Control
Display
Method of An input overcurrent is detected by checking the input current value with the compressor
Malfunction running.
Detection
„ The following current with the compressor running continues for 2.5 seconds.
Malfunction
Decision
Conditions
„ Defective compressor
Supposed
„ Defective power module
Causes
„ Defective outdoor unit PCB
„ Short circuit
Troubleshooting
Check No.07
∗ An input overcurrent may result from wrong internal wiring. If the wires have been disconnected and
Refer to P.149
Check No.08
Refer to P.149
117
Cooling / Heating: Above 9.25 ~ 20 A (Refer to "Input current control" on page 51 for detail.)
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
reconnected for part replacement, for example, and the system is interrupted by an input overcurrent,
take the following procedure.
Check No. 07
Check the installation condition.
Start operation and measure the
input current.
Input current
flowing above its stop level?
YES
Turn off the power and disconnect
the harnesses U, V, and W.
Check with the inverter checker (∗).
Any LED off?
NO
Turn off the power, and reconnect
the harnesses. Turn on the power
again and start operation.
Check No. 08
Check the discharge pressure.
NO
YES
SiENBE04-808_A
Replace the outdoor unit
PCB.
∗ Inverter checker
Part No.: 1225477
Correct the power supply or
replace the PM1.
(Replace the outdoor unit
PCB.)
(R11709)
Service Diagnosis