Capacitor Voltage Check; Power Transistor Check - Daikin Super Multi NX C-Series Service Manual

SiE12-411

6.1.11 Capacitor Voltage Check

Check No.12 Before this checking, be sure to check the main circuit for short-circuit.
" Checking the capacitor voltage
! With the circuit breaker still on, measure the voltage according to the drawing of the model in

6.1.12 Power Transistor Check

" Checking the power transistor
Check No.13
! Never touch any live parts for at least 10 minutes after turning off the circuit breaker.
! If unavoidably necessary to touch a live part, make sure the power transistor's supply
! For the UVW, make measurements at the Faston terminal on the board or the relay
Tester's negative terminal
Tester's positive terminal
Normal resistance
Abnormal resistance
Service Diagnosis
question. Be careful never to touch any live parts.
Fan motor
lead wire
Solenoid valve
coil lead wire
(Room A)
Solenoid valve
coil lead wire
(Room B)
Solenoid valve
coil lead wire
(Room C)
Solenoid valve
lead wire
voltage is below 50 V using the tester.
connector.
Power transistor
Use the tester in
the DC range.
Thermistor Thermistor
lead wire lead wire
(liquid pipe) (gas pipe)
UVW
(+)
Power transistor
UVW
(+)
Several kohms to several Mohms
Compressor
lead wire
Reactor
lead wire
OL
lead wire
Thermistor
lead wire
(Q0366)
Power transistor
(–)
Power transistor
UVW
0 or ∞
Check
UVW
(–)
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