How To Diagnose The Trouble - Toshiba RAS-107SKV-E3 Service Manual

The pulse modulating circuits are mounted to both
indoor and outdoor units. Therefore, diagnose troubles
according to the 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
No. Troubleshooting Procedure
1 First Confirmation
2 Primary Judgement
3 Judgement by Flashing LED
of Indoor Unit
4 Self-Diagnosis by Remote Controller
5 Judgement of Trouble by
Every Symptom
6 Check Code 1C (Miswiring in indoor/
outdoor units) and 1E
7 How to Diagnose Trouble in
Outdoor Unit
8 How to Check Simply the Main Parts
9 How to Simply Judge Whether outdoor
Fan Motor is Good or Bad

11. HOW TO DIAGNOSE THE TROUBLE

Discharging position
(Discharging period
10 seconds or more)
Fig. 11-1
NOTE:
A large-capacity electrolytic capacitor is used in the
outdoor unit controller (inverter). Therefore, if the power
supply is turned off, charge (charging voltage DC280V)
remains and discharging takes a lot of time. After
turning off the power source, if touching the charging
section before discharging, an electrical shock may be
caused. Discharge the electrolytic capacitor completely
by using soldering iron, etc.
<Discharging method>
(1) Remove the inverter cover (plating) by opening
four mounting claws.
(2) As shown below, connect the discharge resistance
(approx. 100Ω40W) or plug of the soldering iron to
voltage between + – terminals of the C12
("CAUTION HIGH VOLTAGE" is indicated.)
electrolytic capacitor (500µF/400V) on P.C. board,
and then perform discharging.
Plug of
soldering
iron
– 57 –
FILE NO. SVM-10017
Inverter cover
PC board
(Soldered surface)