Toshiba RAV-SM800XT-E Summary of Troubleshooting, Before troubleshooting, Outline of Judgment

10. TROUBLESHOOTING

10-1. Summary of Troubleshooting

10-1-1. Before troubleshooting

(1)Required tools/instruments

•e and d screwdrivers, spanners, radio cutting pliers, nippers, etc.

•Tester, thermometer, pressure gauge, etc.

(2)Confirmation points before check

1 The following operations are normal.

a)Compressor does not operate.

•Is not 3-minutes delay (3 minutes after compressor OFF)?

•Does not thermostat turn off?

•Does not timer operate during fan operation?

•Is not outside high-temperature operation controlled in heating operation?

b)Indoor fan does not rotate.

•Does not cool air discharge preventive control work in heating operation?

c)Outdoor fan does not rotate or air volume changes.

•Does not high-temperature release opera- tion control work in heating operation?

•Does not outside low-temperature opera- tion control work in cooling operation?

•Is not defrost operation performed?

d)ON/OFF operation cannot be performed from remote control.

•Is not forced operation performed?

•Is not the control operation performed from

outside/remote side?

2Did you return the cabling to the initial positions?

3Are connecting cables between indoor unit and receiving unit correct?

10-1-2. Troubleshooting procedure

When a trouble occurred, check the parts along with the following procedure.

Trouble → Confirmation of check code by service mode

→Check defective position and parts.

NOTE :

For cause of a trouble, power conditions or malfunc- tion/erroneous diagnosis of microcomputer due to outer noise is considered except the items to be checked. If there is any noise source, change the cables of the signal line to shield cables.

10-1-3. Outline of Judgment

A primary judgment to detect cause of error exists on the indoor unit or outdoor unit is performed in the following procedure.

<Judgment by flashing display on the indoor unit display part>

The indoor unit monitors operating status of the air conditioner, and if a protective circuit works, contents of the self-diagnosis are displayed with a block restricted to the following cases on the indoor unit display part (Sensor).

Table 10-1-1

Remote	Block display	Contents of self-diagnosis	Check code
control code
––	Operation lamp display flashes. (1Hz)	Power failure (In power ON)	––
00	Operation lamp display flashes. (5Hz)	Indoor P.C. board	0b to 0F, 11, 12, b5, b6
01	Operation/timer lamp displays flash. (5Hz)	Inter-unit cables/transmission system	04
02	Operation/defrost lamp displays flash. (5Hz)	Outdoor P.C. board	14 to 19, 1A, 1C
03	Operation/timer/defrost lamp displays flash. (5Hz)	Cycle system, etc.	1d, 1E, 1F, 21
––	––	––	1b, 8b

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