LG GR-S552 Service Manual page 18

7-1-6 ERROR DIAGNOSTIC MODE
1. The error diagnostic mode allows the SVC when a fault that may affect the performance of the product occurs while
operating the product.
2. Even if the function control button is pushed when an error occurs, the function will not be performed.
3. When the error is cleared while the error code is displayed due to a fault, the appliance returns to the normal condition
(Reset).
4. The error code is displayed by the refrigerator temp indication LED on the display of the refrigerator while the remaining
LEDs are off.
NO Error
Faulty refrigerator(R)
1.
sensor (on the control
box of the refrigerator)
2. Faulty defrosting sensor
3.
Defrosting failure
Error Code Display
R1 R2 R3 R4
R1 R2 R3 R4
Cause
Cut or short-circuited wire of
refrigerator sensor
Cut or short-circuited wire of
defrosting sensor
Cut or disconnected wire of
defrosting heater or temperature
fuse(indicated at least 2 hours
later after the error occurs)
- 18 -
: ON
State of Operation with Error
Comp / Cooling fan Defrosting heater
15 min ON/
15 min OFF
No defrosting
: OFF