Haier HRF-660S Service Manual page 18

SERVICE MANUAL
Model:HRF-660S
(6)Defrosting has a higher priority than fast freeze. The defrosting time is included in fast freeze time.
The fast freeze display is on all the time during defrosting. End of fast freeze and end of automatic
defrosting are controlled by respective conditions. When either of the two states is ended, the other state
will not be affected.
2.4.2; Refrigerator load in correspondence with condition 2
(1) Ambient temperature is above 18°C.
(2) If the temperature of R1 is higher than 12°C or the temperature of R1 is higher than 13°C, the
compressor starts up and the air damper of refrigerator compartment is opened. The freezer fan operates
at a speed of 1500RPM.
(3) If R1 reaches shutdown point or the temperature of R2 drops below 2°C, that the refrigerator load
corresponding with condition 2 is ended.
(4) After the end of refrigerator load corresponding with condition 2, the rotation speed of fan is
1300RPM within 10 hours whatever the actual temperature is in freezer or refrigerator compartment.
2.5 Defrosting
2.5.1 Normal defrosting (automatic defrosting)
(1)The compressor operates 7 hours accumulatively before defrosting is activated; when defrosting
SNR reaches above 7°C, defrosting is ended.
(2)The compressor stops and air damper is closed during defrosting.
(3)The compressor operates 4 hours accumulatively upon initial power-on before the first defrosting is
activated.
(4) Automatic defrosting begins after the compressor operates accumulatively 7 hours except for (3).
(5)Defrosting will not begins if there is something wrong with defrosting SNR (short circuit or broken
circuit).
(6) If the defrosting SNR cannot reach 7°C 120 minutes after defrosting, the defrosting heating
element is disconnected and an alarm is given, which glitters in the Position 4. If the SNR can reach 7°C
within 120 minutes, the alarm is canceled.
(7) The compressor and freezer fan are operated before defrosting until the freeze SNR reaches the
shutdown point -2°C to begin defrosting, which minimize the temperature rise in freezer and refrigerator
compartments during defrosting (pre-refrigeration before defrosting).
Issue 201001
Rev.
Ref1001S008V0
18