Toshiba RAV-SP1104AT8-E1 Service Manual page 39

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 TEO and ToO, respectively.
A zone When status (TEO – TE) – (ToO – To) ≥ 3°C
B zone When status (TEO – TE) – (ToO – To) ≥ 2°C
C zone
D zone
4) The time of above d can be changed by
exchanging jumper [J805] with [J806] of the
outdoor control P.C. board.
(Setting at shipment: 150 minutes)
11. High-pressure switch/Compressor case thermostat control
1) When the high-pressure switch or the compressor case thermostat operates, the operation of the
compressor is terminated.
2) The compressor restarts after 5 minutes using [1] as an error count.
After restart, the error count is cleared when operation continues for 10 minutes or more.
3) An error is confirmed with the error count [10].
4) For the indicated contents of error, confirm using the check code table.
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
– 39 –
39 45 55
A zone A zone A zone
B zone B zone B zone
C zone C zone C zone
When status (TEO – TE) ≥ 3°C
continued for 20 seconds
When status (TEO – TE) ≥ 2°C
continued for 20 seconds
J805
×
×
[min.]
d
D zone D zone D zone
In abnormal To
J806 d
150 minutes
Setting at shipment
×
90 minutes
60 minutes
×
30 minutes
×
: Short circuit, : Open