Daewoo ERF-36.A..EU, Service Manual

Page: 48 / 56

12
SHORT CIRCUIT
TEST
1) START : by pressing TEMP CONTROL button 30 times continuously.
2) CANCEL : by pressing TEMP CONTROL button 30 times continuously
Cf. the system generally operates when the limit time 60 hrs. passes.
3) DISPLAY : LOW, MID, HIGH, LED lamps are all on
4) CONTROL : COMP & FAN will be on independent of the operation condition.
(There is no defrost mode on this test.)
13
FUNCTION
OF
TIME
REDUCTION
1) HOW TO REDUCE: (There is no FAST KEY on PCB for MP.)
1 min : Click FAST KEY one time
30 min : If you press FAST KEY continuously, you can reduce 30 minutes on
each second.
2) Practical Use : Can be applied to reduce needless time on test.
EX) function of stop for 6 min, confirming the determination of defrost mode
14
LOW COOLING
OPTION
1) R-SENSOR OFF POINT ADJUST (DOWN 1DEG)
2) If remove J1 when low cooling happens.
Initial residence[31.4k
-
] + 1.5 k
-
=32.9 k
-
Operating R-sensor OFF Point
-
15
`
FUNCTION
OF
LOW ROOM
TEMPERATURE
1) LOW RT TEMP :
-
LOW RT TEMP A : RT SENSOR
≤
14
-
- LOW RT TEMP B : 15 -
≤
RT SENSOR
≤
17 -
2) Control
•
When Comp. is on, R-SENSOR HTR is off.
When it passes 6 min after COMP. was off, R -SENSOR HTR is on.
k
COMP. can ’t be on within 40min after COMP. is off.
l
When it is Mode of General TEMP. or RT -SENSOR ERROR(open or short), R-
SENSOR HTR is off.
-
Condition of LOW RT TEMP A
- R-SENSOR Operating POINT increases 3 -
-
Condition of LOW RT TEMP B
- R-SENSOR Operating POINT increases 1
-
3) Check function of R-S HTR
At initial operation,, R-SENSOR HTR turn on and off four times for 8sec.
Daewoo Electronics 48