Reverse Phase, Open Phase - Daikin VRV Aurora RXLQ-TATJU Series Service Manual

SiUS341802EC

3.63 Reverse Phase, Open Phase

3.63.1 Reverse Phase, Open Phase (Except RXLQ72TAYDU, RXLQ72TAYDA,
RXLQ72TBYDA)
Applicable
RXLQ72-120TATJU, RXLQ72-120TATJA, RXLQ72-120TBTJA, RXLQ96/120TAYDU,
Models RXLQ96/120TAYDA, RXLQ96/120TBYDA, RXLQ72-120TAYCU, RXLQ72-120TAYCA,
RXLQ72-120TBYCA, RXYQ72-168TAYCU, RXYQ72-168TAYCA
U1
Error Code
Method of Error
The phase of each phase are detected by reverse phase detection circuit and right phase or
Detection reverse phase are judged.
Error Decision
When a power supply is reverse phase, or T-phase is open phase.
Conditions
Supposed
 Power supply reverse phase
Causes  T phase open phase
 Defective outdoor unit main PCB (A1P)
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
There is
an open
phase at the power
YES
supply (T phase) terminal
section (X1M) of the
outdoor unit.
NO
Operation
is normal if one
YES
phase of power supply
line phase is
replaced.
NO
Troubleshooting by Error Code
Fix the open phase. Requires
inspection of field power supply
section.
Reverse phase.
Countermeasure of the problem is
completed by phase replacement.
Replace the outdoor unit main
PCB (A1P).
334