How To Diagnose The Trouble - Toshiba RAS-10GAVP-E Service Manual

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.)
No. Troubleshooting Procedure
1 First Confirmation
2 Primary Judgment
3 Judgment by Flashing LED of Indoor Unit
4 Self-Diagnosis by Remote Controller
5 Judgment of Trouble by Every Symptom
K Precautions when handling the new inverter (3DV Inverter)
The high voltage circuit is incorporated.
Be careful to do the check service, as the electric shock may be caused in case of touching parts on the
P .C. board by hand.
The new inverter (3DV inverter) will be incorporated starting with this unit.
K The control circuitry has an uninsulated construction.
Shared potential
Shared potential

11. HOW TO DIAGNOSE THE TROUBLE

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CAUTION: HIGH VOLTAGEN
Photocoupler
MCU
JAVP-E series (insulated type)
MCU
Amplifier
GAVP-E, EAVP-E series (uninsulated type)
Table 11-1
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
How to Simply Judge Whether Outdoor
10
Fan Motor is Good or Bad
G-Tr
FET
(6IN1)
IGBT × 6
Driver Amplifier
FET × 6
Driver
Fig. 11-1
– 60 –
(3DV: 3-shunt Discrete Vector control)
Compressor
Fan motor
Hall device
Photocoupler
Compressor
Fan motor
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