Error Codes: Outdoor Units
ESIE13-02
Part 4 – Troubleshooting
136
3
1
4
5
4.17
“P1”
Open Phase or Power Supply Voltage Imbalance
Remote controller
display
P1
Method of
malfunction
detection
Malfunction is detected according to the voltage waveform of main circuit capacitor built in inverter.
Malfunction
decision conditions
When the aforementioned voltage waveform becomes identical with the waveform of the power supply
open phase.
Supposed causes
Open phase
Voltage imbalance between phases
Faulty outdoor inverter PC board
Faulty main circuit capacitor
Power unit (Disconnection in diode module)
Faulty magnetic relay (K11R, K12R)
Improper main circuit wiring
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Check LED on
the outdoor unit PC board
(Open phase?)
Is the
voltage imbalance
between phases
large?
Open
phase of power supply
voltage?
Other factors than open
phase
Field factors
Field factors
* Replace the outdoor PC board
(A1P) ERHQ***V3* / ERLQ***V3*
* Replace the inverter PC board
(A2P) ERHQ***W1* / ERLQ***W1*
NO
YES
YES
NO
YES
NO
(Note)
Target : ±10V between phases,
R-S, S-T, T-R
