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 higher for 3 seconds
or continued 7°C ≤ TE < 12°C for 1 minute. The defrost operation also finishes when it continued
for 10 minutes even if TE sensor temperature was 7°C or lower.
3) After defrost operation was reset, the compressor stopped for approx. 40 seconds and then
the heating operation starts.
0 10 15 4539 55 d
[min.]
∗
TE [˚C]
–2
–5
–10
–25
A zoneA zone
B zoneB zone
C zoneC zone
Start of heating operation
D zoneD zone
∗ 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.
4) The time of above d can be changed by exchanging jumper [J805] and [J806] of the outdoor
control P.C. board.
(Setting at shipment: 150 minutes)
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°C When status (TE0 – TE) ≥ 2°C
continued for 20 seconds continued for 20 seconds
When the status (TE ≤ –25°C) continued for 20 seconds
When compressor operation status of TE < –2°C is calculated as d minutes
Operation flow and applicable data, etc.
Description
Item
FILE NO. SVM-13004
– 36 –
10. Detrost control
(only in heating
operation)
¡
: Short circuit,
×
: Open
J805 J806
¡¡
¡ ×
× ¡
××
d
150 minutes
Setting at shipment
90 minutes
60 minutes
30 minutes
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