Daikin FTK25JV1NB9, Руководство по обслуживанию

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Si04-115 Check
Service Diagnosis 85
6. Check
6.1 How to Check
6.1.1 Power transistor check
Capacitor voltage check
Check No.3 1. Power transistor check
Note: Check to make sure that the voltage between the terminal of Power transistor (+) and (-) is
approx. 0 volt before checking power transistor.
< Measuring method >
Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the
connector, press the protrusion on the connector.
Then, follow the procedure below to measure resistance between power transistor (+) and (-)
and the U, V and W terminals of the compressor connector with a multi-tester. Evaluate the
measurement results for a pass/fail judgment.
<Power transistor check>
<Measuring positions>
2. Capacitor voltage check
< Measuring method >
Before measuring, operate the unit for several minutes, then shut down the operation by force
using the circuit breaker.
"
If the unit is shut down using the remote controller instead of the circuit breaker, the
capacitor discharges the electric load, thus disallowing accurate measurement.
Note: The charge section is applied with high voltage. Therefore, exercise caution during
measurement to prevent electric shock.
Negative (-) terminal of
tester (positive terminal
(+) for digital tester) Power transistor
(+)
UVW Power transistor
(-)
UVW
Positive (+) terminal of
tester (negative terminal
(-) for digital tester) UVW Power transistor
(+)
UVW Power transistor
(-)
Normal resistance Several k
Ω
to several M
Ω
(
∗
)
Unacceptable resistance Short (0
Ω
) or open
MULTIMETER
(DC, VOLTAGA RANGE)
DB1
TRM1
S90 THERMISTOR LEAD WIRE S80 FOUR WAY VALVE LEAD WIRE (RX TYPE ONLY)
S70 FAN MOTOR LEAD WIRE
REACTOR LEAD WIRE
COMPRESSOR LEAD WIRE