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ESIE09-08
3.50 "P1" Indoor Unit: High Voltage of Capacitor in Main
Inverter Circuit
P1
Remote Control
Display
Subcode 6
Applicable
All indoor units
Models
Method of
Malfunction is detected according to the voltage waveform of main circuit capacitor built in the
inverter.
Malfunction
Detection
Malfunction
When the aforementioned voltage waveform becomes identical with the waveform of the power
Decision
supply open phase.
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Defect of main circuit capacitor
Improper main circuit wiring
Defect of indoor unit inverter PC board [A4P (1ø) or A5P (3ø)]
Imbalance of phase-to-phase voltages
Open phase
Be sure to turn off power switch before connect or disconnect connector, or
Caution
parts damage may be occurred.
Make measurement of power
supply voltages between L1 and
L2, L1 and L3, and L2 and L3.
Have the
power supply voltages of
three phases fallen within the range
of rated voltage ±10%?
YES
Has the
imbalance of
phase-to-phase voltages
fallen within
±10%?
YES
Troubleshooting by Indication on the Remote Controller
NO
NO
Correct the power supply voltages.
Correct the power supply voltages.
Replace the inverter PC board assy
ø
ø
[A4P (1
) or A5P (3
)].
189
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Troubleshooting
