Daikin REYQ8-48PY1B, Руководство по обслуживанию

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Troubleshooting by Indication on the Remote Controller SiBE37-701_B
341 Troubleshooting
3.48
“
U1
”
Reverse Phase, Open Phase
Remote
Controller
Display
U1
Applicable
Models REYQ8P~48P
Method of
Malfunction
Detection The phase of each phase are detected by reverse phase detection circuit and right phase or
reverse phase are judged.
Malfunction
Decision
Conditions When a significant phase difference is made between phases.
Supposed
Causes
„
Power supply reverse phase
„
Power supply open phase
„
Defect of outdoor PCB (A1P)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Fix the open phase. Requires
inspection of field power supply
section.
There is an open phase
at the power supply
terminal section (X1M) of
the outdoor unit.
NO
Operation is
normal if one place
of power supply
line phase is
replaced.
NO
YES
YES
Reverse phase
Counter measure of the problem is
completed by phase replacement. Reverse phase
Counter measure of the problem is
completed by phase replacement.
Replace the outdoor unit PCB
(A1P).
• With individual systems, replace
the control PCB 1 (A1P) or the
control PCB 3 (A3P).
• With multi systems, replace the
main PCB (A1P).