How To Diagnose The Trouble - Toshiba RAS-B10GKVP-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
6 Check Code 1C and 1E
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
M14GAV-E, M14GACV-E, M18GAV-E, M18GACV-E (uninsulated type)

11. HOW TO DIAGNOSE THE TROUBLE

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78
79
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88
CAUTION: HIGH VOLTAGE
Photocoupler
MCU
M18YAV-E, M18YACV-E (insulated type)
MCU
Amplifier
Table 11-1
No. Troubleshooting Procedure
7 Trouble Diagnosis by Outdoor LED
8 Troubleshooting
9 How to Diagnose Trouble in Outdoor Unit
10 How to Check Simply the Main Parts
How to Simply Judge Whether Outdoor
11
Fan Motor is Good or Bad
G-Tr
FET
(6IN1)
IGBT × 6
Driver Amplifier
FET × 6
Driver
Fig. 11-1
– 76 –
(3DV: 3-shunt Discrete Vector control)
Compressor
Hall device
Photocoupler
Compressor
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90
92
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98
Fan motor
Fan motor