LG CV-H186BLB0 Service Manual page 49

Possible Trouble 5
Is 4way-valve operated?
YES
Is IC02M operated
normally?
YES
Check the RY-4WAY
and 4way-valve
Possible Trouble 6
Is the F/OP key
any problem?
NO
Check P.C.B pattern check
: Ineffective Heating
NO
NO
: The unit does not operate by forced operation switch.
YES
–49–
Check RY-4WAY
Exchange IC02M
Exchange F/OP key