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