P1" Open Phase Or Power Supply Voltage Imbalance - Daikin ESIE13-02 Service Manual

Error Codes: Outdoor Units

"P1" Open Phase or Power Supply Voltage Imbalance

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