Defrost Heater Error (F dH)
1
Reconnect the
housing
Check the Main PCBA connect
Is Loose ?
Yes
No
2
Check the Defrost control part of Main PCB
Housing.
Is Sheath Heater resistance 35~40Ω?
Yes
To step 4
4
Check the Heater Voltage is 110V ~ 120V?
No
3
No
Yes
Replace sheath
heater
Enter Test 3 mode
REF after running A period of time and then push
test button 3 times and show ’33 33’ in Display
PCB
Replace
Main PCB
NO
TEST MODE 3 Voltage [V]
CON3
2
nd
pin ~ 9
th
pin
110V ~ 120V
Yes
5
Explain to customer
Check the Defrost control part of Sheath
Heater Housing
Is Sheath Heater resistance 35~40Ω?
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