Midea HD-663FWEN, Service Manual

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Service Manual_2020-V1.0
40
9.2.2 Temperature setting of freezing chamber
Temperature gear of
freezer chamber
COLD Mid COLDER
Temperature value
＜-12℃ ＜-17.8℃ ＜-21℃
9.3 Mode setting
9.3.1 Standby mode
1
）
When the refrigerator is working, keep pressing the “
SET
” button for 3 seconds, the standby
indicator will light up and the refrigerator will stop working.
2
）
When the refrigerator is in standby mode, press the “
SET
” button once, the standby indicator will light
off and the refrigerator will operate normally.
9.3.2 Locking and unlocking (None)
9.4 Defrosting function
◆
Defrosting theory:
The defrosting of evaporator is realized by the heating of heater, following the temperature rise, the frost
on evaporator becomes water, and the water flow into the evaporating pan via the draining system, the
water in evaporating pan evaporate away finally
◆
Defrosting steps:
The fan motor stop work--- Compressor shutdown--- the heater start working ---the heater stop when the
temperature rise to setting--- after 7 minutes, if the start-up condition is reached, the compressor will
start--- after 3 minutes, the fan motor will start work
◆
Meet one of the following conditions , defrost heating exit:
1) When the frozen defrosting sensor has no fault, the measured temperature Tfd
≥
the set
temperature which defrost heating exit
2) When the frozen defrosting sensor has no fault, the defrosting time is
≥
60 minutes
3) When the frozen defrosting sensor is faulty , the heater will stop after work 20 minutes
9.5 Open door alarm
(None)
9.6 Error code and solutions
Error code Fault Type Troubleshooting and Solutions
LED
①
and LED
②
together lighten
Refrigerator chamber
sensor failure (E1)
Step 1 : Check whether the connection terminals are
plugged in place and whether there are foreign matters in
them; after cleaning the terminals, plug them in again.
Step 2 : If the fault still occurs, pull out the corresponding
connection terminal on the main PCB, use a multimeter to
check the resistance value of the sensor, and confirm
whether it is normal.
Step 3 : If the resistance value is wrong, replace the
sensor.
Step 4 : If the fault still occurs, replace the main PCB.
LED
①
and LED
③
together lighten
Freezer defrost sensor
failure(E5)
LED
①
and LED
④
together lighten
Ambient temperature
sensor failure (E7)