Check Si01-406
120 Service Diagnosis
5.8 Inverter Units Refrigerant System Check
Check No.11
5.9 Capacitor Voltage Check
Check No.12 < 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.
< Measuring positions >
Take measurements at the power transistor (+) and (-) terminals in the same way as described
in section 1.
Set the multi-tester to DC and VOLTAGE RANGE before measurement.
∗
Since capacitor (+) and (-) are connected to power transistor (+) and (-), capacitor voltage
can be measured at the power transistor (+) and (-) terminals.
Refrigerant system check
Check for gas leaks.
See the section on insufficient gas
detection.
Conduct the check after operating the
equipment for a sufficient length of time.
Correct the problem.
Conduct vacuum drying.
Replace the refrigerant.
Is
the discharge
thermister disconnected from
the holder?
(R1445)
YES
YES
YES
Is any moisture
found in sight glass.
NO
NO
To Next Page
Loading...
Need help?
General
