Daewoo ERF-384, Service Manual

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Nº FUNCTION CONTENTS
5 6
Pcb Control Functions
7 DETERMI-
NATION OF
DEFROST
1) Starting condition of Defrost Mode
1.1- When accumulated running time of comp. is 12hrs.
1.2- After checking the condition ‘1.1’ if total time(COMP on time + COMP
off time) is more than 48hrs, then defrost mode starts
immediately.
1)General Defrost Mode
1.1- Start: by determination of defrost
1.2- Process: general operation heater on pause(6 min) general
operation.
Heater defrost: when the temperature at D-sensor is over 10°C, heater
turns off.
Limit time: If the system is on D-sensor error, heater is off by time(30
min).
D2 error: 80 min in defrost position (defrost problem).
2)Forced Defrost Mode
2.1- Start: by press TEMP. CONTROL button for 5 seconds continuously.
2.2- Process: same as General Defrost Mode
General Defrost Mode is on for initial 30 seconds after heater is on.
(for TEST)
1) When power is on, if the temperature at the D-sensor is under 3.5°C, then
General Defrost Mode starts.
1) RT
≤
24: The COMP can’t be on within 30 min after comp. is off even
though R-sensor is on condition.
(This is to protect comp.) FUNCTION of LOW RT.
2) RT > 24: The COMP can’t be on within 6 min after comp. is off even
though R-sensor is on condition.
(This is to protect comp.)
1) D1 ERROR (It happens when D-SENSOR is OPEN or SHORT)
1.1- DISPLAY: FREEZER RED LED lamp in on & off one time.
1.2- CONTROL: return to the limit defrost time of Defrost (30 min).
2) D2 ERROR (It happens when heater is off by time (80 min).
2.1- DISPLAY: FREEZER RED LED lamp in on & off two times.
2.2- CONTROL: Return to the limit defrost time of Defrost (80 min).
3) R1 ERROR (It happens when R-SENSOR is OPEN or SHORT).
3.1- DISPLAY: REFRIGERATOR RED LED lamp in on & off one time.
3.2- CONTROL: controlled by the condition of RT
3.3- CANCEL: when R-SENSOR is working normally.
4) RT ERROR (It happens when RT-SENSOR is OPEN or SHORT)
8 DEFROST
MODE
9 INITIAL
DEFROST
10 PREVENTION
OF COMP.
RESTART
11 ERROR
DISPLA Y
&
CONTROL
RT-S TEMP RT-S ERROR ~24ºC 25ºC ~40ºC
COMP. work rate (%) 40% 30% 44%
ON/OFF (min) 20 / 30 15 / 35 22 / 28
NOTE ERROR Low RT TEMP General