Service Manual

62
10. Defrost control
<SP56 only>
1) In heating operation, defrost operation is performed when TE sensor satisfies any condition in A zone to D
zone.
2) During defrosting operation, it finishes if TE sensor continued 12°C or continued 5°C £ TE < 12°C for
80 seconds. The defrost operation also finishes when it continued for 15 minutes even if TE sensor tem-
perature was 5°C or lower.
3) After defrost operation was reset, the compressor stopped for approx. 40 seconds and then the heating
operation starts.
The minimum TE value and To value between 10 and 15 minutes after heating operation has started are
stored in memory as TE0 and To0, respectively.
0 10 15 29 35 91
[min.]
TE [˚C]
4
6
10
25
A zoneA zone
B zoneB zone
C zoneC zone
Start of heating operation
D zoneD zone
A zone
B zone
C zone
D zone
In normal To In abnormal To
When status (TE0 TE) (To0 To) 3°C When status (TE0 TE) 3°C
continued for 20 seconds continued for 20 seconds
When status (TE0 TE) (To0 To) 2.5°C When status (TE0 TE) 2.5°C
continued for 20 seconds continued for 20 seconds
When the status (TE 26°C) continued for 20 seconds
When the status (TE 10°C) continued for 20 seconds