Toshiba RAV-SP1104AT8ZG-TR, RAV-SP1104AT8-TR, RAV-SP1404AT8ZG-TR service manual Defrost control, 56

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

A zone

–10

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 TEO and ToO, respectively.

	In normal To	In abnormal To
A zone	When status (TEO – TE) – (ToO – To) ≥ 3°C	When status (TEO – TE) ≥ 3°C
	continued for 20 seconds	continued for 20 seconds
B zone	When status (TEO – TE) – (ToO – To) ≥ 2°C	When status (TEO – TE) ≥ 2°C
	continued for 20 seconds	continued for 20 seconds
C zone	When status (TE ≤ –23°C) continued for 20 seconds
D zone	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] with [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

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.

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