Defrost Control - Toshiba RAV-SM564UT-E Service Manual

Toshiba SDI / DI tuotteiden jälleenmyyjä pääkaupunkiseudulla on Jäähdytinpalvelu RefGroup Oy.

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
–2
–5
–10
–23
∗ 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.
When status (TE0 – TE) – (To0 – To) ≥ 3°C
A zone
When status (TE0 – TE) – (To0 – To) ≥ 2°C
B zone
C zone
D zone
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)
10 15
∗
In normal To
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
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A z A zone A zone one
B zone B zone B z one
C z C zone C zone one
When status (TE0 – TE) ≥ 3°C
continued for 20 seconds
When status (TE0 – TE) ≥ 2°C
continued for 20 seconds
J805 J806
¡ ¡
×
¡
×
¡
× ×
[min.]
d
D zone D zone D z one
In abnormal To
d
150 minutes
Setting at shipment
90 minutes
60 minutes
30 minutes
¡ ×
: Short circuit, : Open