LG AS-W306MMH0 Svc Manual page 68

Troubleshooting Guide
4) Troubleshooting CH22
Display
Title
code
21
Max. C/T
C/T
22
Internal circuit
Check Point
1. Check the power source.
2. Check the fan operation is right.
3. Check the current.
4. Check the install condition.
5. Check the internal circuit. (C/T, Diode, Resistor)
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Only for training and service purposes
Cause of error
Over current (13A )
Initial current error
V
Check point & Normal condition
Malfunction of compressor
Blocking of pipe
Low voltage input
Refrigerant, pipe length, blocked, ...
Malfunction of current detection circuit.
(Open / Short)
The voltage of "C01N" Is 4.0Vdc(25A) .
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