SUPER DIGITAL

10. Defrost control
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.
Start of heating operation
TE [˚C]
0 10 15 39 45 55 d [min.]
–2
–5
–10
A zone
B zone
D zone
–23
∗
C 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.
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 status (TE ≤ –23°C) continued for 20 seconds
When compressor operation status of TE < –2°C is calculated by d portion
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)
J805
J806
¡ ¡
¡ ×
× ¡
× ×
d
150 minutes
Setting at shipment
90 minutes
60 minutes
30 minutes
¡ : Short circuit, × : Open
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