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Defrost Heater Error
Is Er-dH displayed?
Yes
Is the connection loose?
CON6
CON3
No
Reconnect
Yes
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Enter the TEST 3 MODE
Is the voltage value between
pins 10 (BO) and 4 (BL) of
CON3 115 V AC?
Pin4 BL Pin10 BO
Relay operation
Test Point
Result
pin4 To pin10
115V
Yes
Reset TEST3 MODE(Normal)
Is the voltage value between
pins 10 (BO) and 4 (BL) of
CON3 0 V AC?
pin4 BL pin10 BO
Relay Open
Test Point
Result
Reset/Norm OP
0 ~ 2 V
Yes
Replace
No
MAIN PWB
(Position No
: 500A)
Replace
MAIN PWB
No
(Position No
: 500A)
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