Daikin VRV Inverter K Series Manual page 343

SI-05C.BOOK Page 329 Monday, November 6, 2000 4:13 PM
SiE-05C
5.8 Open Phase
P P P P 1 1 1 1
Remote Controller
Display
Supposed Causes
Troubleshooting
Troubleshooting PLUS Series
Open phase
Voltage imbalance between phases
Defect of main circuit capacitor
Defect of inverter unit
Defect of K1M
Improper main circuit wiring
Imbalance
YES
in supplied voltage is
in excess of 20 V (Y1,
YAL). ∗1
NO
Is the
voltage imbalance
YES
applied to the inverter in
excess of 20 V (Y1,
YAL)? ∗2
NO
When voltage monitoring is possible:
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
∗In accordance with "notification of inspection results" accompanying spare parts.
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.
How to Use The Monitor Switch On The Inverter PC Board
YES
Open phase?
NO
∗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.
Disposal
Be sure to explain to the user that
there is a "power supply imbalance"
for which DAIKIN is not responsible.
: http://splitoff.ru/tehn-doc.html
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)
329