Toshiba Understanding SW801 Maintenance Check Operations for Air Conditioners

2. Special operation for maintenance check (SW800 and SW801 operations)

The following special operations for maintenance check can be performed by handling the service switches SW800 and SW801.

[Operating method]

1)Check LED display is the initial status. If it is not so, set the initial status.

2)Push and hold SW800 for 5 seconds or more and then check D804 flashes slowly.

3)Push SW800 and then stop it at the LED display of the function item to be set.

Special operation

Refrigerant recovery operation

PMV full open operation

PMV full close operation

PMV middle opening operation

Indoor heating trial operation command

Indoor cooling trial operation command

Fan motor forced operation

4-way valve relay operation

		LED display			Control contents
D800	D801	D802	D803	D804	The outdoor unit performs cooling operation. As the
					indoor unit does not operate by this operation only, carry
					out the fan operation beforehand. (Refer to 9-3-1.)
D800	D801	D802	D803	D804	Open PMV (Electronic expansion valve) fully.
					Execute the following item 6) or the control returns to
					normal operation after 2 minutes. (Refer Note 1)
					Close PMV (Electronic expansion valve) completely.
D800	D801	D802	D803	D804
					Execute the following item 6) or the control returns to
					normal operation after 2 minutes. (Refer Note 1)
D800	D801	D802	D803	D804	Open PMV (Electronic expansion valve) to middle
					position (250 pulses).
					Execute the following item 6) or the control returns to
					normal operation after 2 minutes. (Refer Note 1)
D800	D801	D802	D803	D804	Carry out a trial heating operation.
					The operation returns to the normal control by executing
					the following item 6). (Refer Note 2)
					Carry out a trial cooling operation.
D800	D801	D802	D803	D804
					The operation returns to the normal control by executing
					the following item 6). (Refer Note 2)
D800	D801	D802	D803	D804	Operate the fan motor forcedly.
					Execute the following item 6) or the control returns to
					normal operation after 2 minutes. (Refer Note 1)
					Turn on 4-way valve power relay (CN700)
D800	D801	D802	D803	D804
					Execute the following item 6) or the control returns to
					normal operation after 2 minutes. (Refer Note 1)

: ON, : OFF, : Rapid flashing (5 times/second)

(Note 1) Although these special operations are available even operating time, basically carry out these operations while the machine stops. If carrying out these operations, the pressure may change suddenly and a danger may grow.

(Note 2) Indoor trial cooling operation request / Indoor trial heating operation request

Cooling/heating trial operations are available from the outdoor unit only in combination with the following indoor units.

Trial operation is available: Indoor units after 4 series (RAV-SM****4*T-E)

Trial operation is unavailable: Indoor units except the above units or in case that the indoor units except the above units are included at twin connection.

Note) The forced trial operation in this setting cannot be cleared by the indoor remote controller. Be sure to clear it by operation of the outdoor unit (6 below).

4)Push SW801 and then stop it at point where D805 becomes rapid flashing.

5)Push and hold SW801 for 5 seconds or more. D804 changes to slow flashing, D805 changes lighting and then the special operation becomes valid.

6)To invalidate various settings, push and hold SW800 and SW801 for 5 seconds or more simultaneously. D800 to D804 go off (or rapid flashing), D805 goes on (Initial status: Display of error which is occurring at present), and then the special operation becomes invalid (normal control).

*If an unknown point generated on the way of the operation, push and hold SW800 and SW801 for 5 seconds or more simultaneously. You can return to the item 1).

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