Output Overcurrent Detection - Daikin SUPER MULTI NX CTXS07JVJU Service Manual

Troubleshooting for Outdoor Unit

6.20 Output Overcurrent Detection

L5
Remote
Controller
Display
j
Outdoor Unit LED A
Display
Method of
An output overcurrent is detected by checking the current that flows in the inverter DC section.
Malfunction
Detection
 A position signal error occurs while the compressor is running.
Malfunction
 A speed error occurs while the compressor is running.
Decision
 An output overcurrent signal is fed from the output overcurrent detection circuit to the
Conditions
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 5 minutes without any other error
 Poor installation condition
Supposed
 Closed stop valve
Causes
 Defective power module
 Wrong internal wiring
 Abnormal power supply voltage
 Defective outdoor unit PCB
 Defective compressor
189
h h i h
1 2 3 4
microcomputer.
SiUS12-928_B
Service Diagnosis