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11. HOW TO DIAGNOSE THE TROUBLE
The pulse motor circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to
the trouble diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring
diagrams attached to the indoor/outdoor units.)
Table 11-1
11-1. First Confirmation
11-1-1. Confirmation of Power Supply
Confirm that the power breaker operates (ON) normally.
11-1-2. Confirmation of Power Voltage
Confirm that power voltage is AC 220–230–240 ± 10%.
If power voltage is not in this range, the unit may not operate normally.
11-1-3. Operation Which is not a Trouble (Program Operation)
For controlling the air conditioner, the program operations are built in the microcomputer as described in the
following table.
If a claim is made for running operation, check whether or not it meets to the contents in the following table.
When it does, we inform you that it is not trouble of equipment, but it is indispensable for controlling and
maintaining of air conditioner.
Table 11-1-1
No.
Troubleshooting Procedure
1
First Confirmation
2
Primary Judgment
3
Judgment by Flashing LED of the signal receiving unit
4
Self-Diagnosis by Remote Controller
5
Judgment of Trouble by Every Symptom
No.
Troubleshooting Procedure
6
How to Check Simply the Main Parts
7
Troubleshooting
8
How to Diagnose Trouble in Outdoor Unit
9
How to Check Simply the Main Parts
10
How to Simply Judge Whether Outdoor Fan Motor is
Good or Bad
No.
Operation of air conditioner
Description
1
When power breaker is turned “ON”, the
operation indicator (Green) of the signal
receiving unit flashes.
The OPERATION lamp of the signal receiving unit
flashes when power source is turned on. If [
] button
is operated once, flashing stops.
(Flashes also in power failure)
2
Compressor may not operate even if the room
temperature is within range of compressor-ON.
The compressor does not operate while compressor
restart delay timer (3-minutes timer) operates.
The same phenomenon is found after power source
has been turned on because 3-minutes timer operates.
3
In Dry and ECO mode, FAN (air flow) display
does not change even though FAN (air flow
select) button is operated.
The air flow indication is fixed to [AUTO].
4
In AUTO mode, the operation mode is changed. After selecting Cool or Heat mode, select an operation
mode again if the compressor keeps stop status for
15 minutes.
Summary of Contents for ras-m07g3dv-e
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