X93;P1” Open Phase Or Power Supply Voltage Imbalance - Daikin EHYHBH05AAV3 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
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
136
ESIE13-02A