Input Overcurrent Detection - Daikin FTXS30LVJU Service Manual

SiUS091133

4.15 Input Overcurrent Detection

E8
Remote
Controller
Display
Method of
An input overcurrent is detected by checking the input current value with the compressor running.
Malfunction
Detection
 The current exceeds about 9.25 ~ 20 A for 2.5 seconds with the compressor running.
Malfunction
Decision
Conditions
 Outdoor temperature is out of operation range.
Supposed
 Defective compressor
Causes
 Defective power module
 Defective outdoor unit PCB
 Short circuit
Troubleshooting
∗ An input overcurrent may result from wrong internal wiring. If the system is interrupted by an input
Check No.15
Refer to P.146
Check No.17
Refer to P.149
Check No.18
Refer to P.150
Service Diagnosis
(The upper limit of the current decreases when the outdoor temperature exceeds a certain
level.)
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
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.
Input current flowing
above its stop level?
YES
Turn off the power and disconnect
the harnesses U, V, and W.
Check No.15
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. 18
Check the discharge pressure.
NO
∗ Inverter checker
Part No.: 1225477
YES
Troubleshooting
Replace the outdoor unit
PCB.
Correct the power supply or
replace the outdoor unit
PCB.
(R14440)
118