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SiE-05C
How to Use The Monitor Switch On The Inverter PC Board
Troubleshooting PLUS Series
329
5.8
Open Phase
Remote Controller
Display
PPP
P1111
Supposed Causes
Open phase
Voltage imbalance between phases
Defect of main circuit capacitor
Defect of inverter unit
Defect of K1M
Improper main circuit wiring
Troubleshooting
Imbalance
in supplied voltage is
in excess of 20 V (Y1,
YAL).
∗
1
Is the
voltage imbalance
applied to the inverter in
excess of 20 V (Y1,
YAL)?
∗
2
YES
NO
NO
NO
YES
YES
Disposal
Open phase?
Using a device capable of constant
recording of power supply voltage
record power supply voltage
between 3 phases (L1~L2, L2~L3,
L3~L1) for about one continuous
week.
Power supply voltage imbalance
When voltage monitoring is possible:
Explanation for users
Give the user a copy of "notification of inspection results"and leave it up
to him to improve the imbalance.
Contact QC div.
Be sure to send a product report of the imbalance.
∗
1.
Measure voltage at the Z1F power
supply terminal block.
∗
2.
Measure voltage at terminals L1, L2 and
L3 of the diode module inside the
inverter while the compressor is
running.
Be sure to explain to the user that
there is a "power supply imbalance"
for which DAIKIN is not responsible.
∗
In accordance with "notification of inspection results" accompanying spare parts.
Open phase
Normalize field cause.
Fix power supply voltage
imbalance.
Part or wiring defect
After turning the power
supply OFF, check and
repair the main circuit wiring
or parts.
(1) Loose or disconnected
wiring between power
supply and inverter
(2) K1M contact disposition,
fusion or contact is poor.
(3) Loose or disconnected
noise filter
(VF165)
SI-05C.BOOK Page 329 Monday, November 6, 2000 4:13 PM
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