How To Diagnose The Trouble - Toshiba RAS-M13PKVP-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 Confi rmation
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
Precautions when handling the 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 control circuitry has an uninsulated construction.
Shared potential
11.

HOW TO DIAGNOSE THE TROUBLE

Page
74
75
75
76
79
84
CAUTION: HIGH VOLTAGE
MCU
M18UAV-E (uninsulated type)
Table 11-1
No. Troubleshooting Procedure
7 Trouble Diagnosis by Outdoor LED
8 Troubleshooting
9 How to Diagnose Trouble in Outdoor Unit
10 Inspection of the Main Parts
How to Simply Judge Whether Outdoor
11
Fan Motor is Good or Bad
IGBT × 6
Driver Amplifier
FET × 6
Driver
Amplifier
Fig. 11-1
– 72 –
Page
85
86
87
88
93
Compressor
Fan motor