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10-3. Fault Assessment of Indoor/Outdoor Unit
10-3-1. Fault Assessment of Indoor Unit
●
If no abnormality is detected, carry out fault assessment of the outdoor unit.
10-3-2. Fault Assessment of Outdoor Unit
●
If no abnormality is detected, carry out fault assessment of the indoor unit (if not previously done).
How to use the TEST/T-RUN terminals
T-RUN: Test run (compressor, fan motor, 4-way valve are all ON)
TEST:
Time-scales are reduced to 1/60 (operations occur 60 times faster than normal).
No.
Operation
Checkpoints (conditions of the unit)
●
Rated voltage exists for inter-unit wiring between 1 and 2.
●
Connect 2 and 3 with a 5k
Ω
resistor. Measurement of the voltage
between these must show 12V to 15V, with fluctuation occurring once
every 4 seconds.
COM
T-RUN
TEST
TEST/T-RUN terminals
Set operation selector of indoor unit
to DEMO and start operation using
remote control unit.
1
No.
Operation
Checkpoints (operation of the unit)
●
RED LED on control board should turn on.
●
Compressor, fan motor and 4-way valve should all be ON.
Apply rated voltage between 1 and 2
of terminal block on outdoor unit.
Short-circuit the COM and T-RUN ter-
minal in outdoor unit.
1
2
