Toshiba MAR - M81HTM8 - E Service Manual page 37

TOSHIBA
These systems have a feature which enables them to check that the wiring and piping connections are
aligned with each other. This is carried out by allowing refigerant flow to one indoor unit at a time
and monitoring that indoor unit's coil sensor for a corresponding drop in temperature. Each indoor
unit is tested in turn and where two multi controllers are installed each multi controller is tested in
turn.
This test would normally be used at the commissioning stage.
Procedure for initialising the circuit test.
1. Turn the power off, and disconnect any T2s (optional) fitted.
2. Put the outdoor display switch to 9 and multi controller(s) display switch to 6.
3. Turn the power back on.
4. Set all the remote controllers to cool mode and 29ºC.
5. Press the on/off button to start the indoor units (fans will run).
6. Go to outdoor unit press switch J2 (above 8 x LEDs) for 3 sec .
7. The system is now self-testing (all 8 LEDs will be flashing rapidly).
8. The system will stop at the end of the test, indicated by the on/off lights flashing.
In the event of cross wiring/piping the system will indicate which units are faulty, see pages 15 & 17
AUGUST 1997
7. Circuit Test Procedure
Page 18