Daikin FTXS36HVJU - Input Overcurrent Detection

Troubleshooting SiUS04-924_A
Service Diagnosis 85
4.12 Input Overcurrent Detection
Remote
Controller
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 current exceeds 20 A for 2.5 seconds with the compressor running.
(The upper limit of the current decreases when the outdoor temperature exceeds a certain
level.)
Supposed
Causes
 Defective compressor
 Defective power module
 Defective outdoor unit PCB
 Short circuit
Troubleshooting
Check No.15
Refer to P.114
Check No.17
Refer to P.117
Check No.18
Refer to P.118
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
(R14701)
NO
YES
YES
NO
∗ An input overcurrent may result from incorrect internal wiring. If the system is interrupted by an input
overcurrent after the wires have been disconnected and reconnected for part replacement, check the
wiring again.
Check No. 17
Check the installation condition.
Start operation and measure the
input current.
Turn off the power and disconnect
the harnesses U, V, and W.
Check No. 15
Check with the inverter checker (∗).
Turn off the power, and reconnect
the harnesses. Turn on the power
again and start operation.
Check No. 18
Check the discharge pressure.
Replace the outdoor unit
PCB.
Correct the power supply or
replace the PM1.
(Replace the outdoor unit
PCB.)
∗ Inverter checker
Part No.: 1225477
Input current flowing
above its stop level?
Any LED off?