Diagnose Trouble In Outdoor Unit - Toshiba RAS-07PKVP-E Service Manual

High Wall, Heat Pump Type

10-10.Diagnose Trouble in Outdoor Unit

Table 10-10-1
Diagnosis/Process flowchart
Remove connector
of compressor.
NG
Check 25A fuse
(Part No.F01).
OK
Replace fuse.
Check
electrolytic
capacitor, diode
block (DB01),
Check
NG
terminal voltage
of electrolytic
capacitor.
OK
Check
electrolytic
capacitor, diode
(DB01),
NO
Does outdoor
fan rotate?
YES
Remove connector
CN300 of outdoor fan
NG
motor, and using a
tester, check resistance
value between every
phases at motor side.
OK
Replace
outdoor
fan motor.
A B
Item
Preparation
Check
Check
etc.
etc.
Operation
Measurement Measure terminal voltage of the
Check
Stop
Check
Measurement
Contents
Turn "OFF" the power supply
breaker, and remove 3P connector
which connects inverter and
compressor.
• Check whether 25A fuse on the
control board assembly is blown
or not.
(F01)
Turn on the power breaker, and
operate the air conditioner in COOL
mode by time shortening.
electrolytic capacity.
500μF:400WV × 3
After operation, turn off the power
breaker after 2 minutes 20 seconds
passed, and discharge the
electrolytic capacitor by soldering
iron.
Check voltage between motor
phases.
• Is not winding between [1]-[2]‚ [2]-
[3], or [1]-[3] opened or short-
circuited?
• Is not frame grounded with [1], [2],
or [3]?
87
Service Manual
Summary
If fuse was blown, be sure to check
the electrolytic capacitor and diode
block.
(DB01)
• Connect discharge resistance
(approx. 100Ω, 40W) or soldering
iron (plug) between +, – terminals
of the electrolytic capacitor
(500µF) of C08 (with printed
CAUTION
HIGH VOLTAGE) on P.C. board.
Discharging position
(Discharging period
10 seconds or more)
Plug of
soldering
iron
OK if 500µF →
DC280 to 380V
Remove CN300 while pushing the
part indicated by an arrow because
CN300 is a connector with lock.
→ Resistance between
phases should be approx. 55 to
77Ω
→ Should be 10MΩ or more.