How to Use The Monitor Switch On The Inverter PC Board SiE-05C
328 Troubleshooting PLUS Series
5.7 Power Supply Insufficient
Remote Controller
Display
UU
UU
22
22
Supposed Causes Power supply insufficient
Instantaneous failure
Open phase
Defect of inverter unit
Defect of outdoor PC board
Defect of K1M.
Main circuit wiring defect
Troubleshooting
Turn on again.
Turn K1M ON.
The
voltage between
the P and N terminals is
320 VDC (Y1, YAL) or more
when the compressor
is running.
"U2" blinks again.
Monitor field power supply.
NO
NO
NO
NO
YES
YES
YES
YES
Is 220~240 V
of power reaching the K1M
coil?
Does
the voltage
between terminals P
and N gradually rise to 339
VDC (Y1, YAL) after
turning on?
Is 220~240 V at
the connector of X1A.
Is 220~240 V of
power reaching X5A of outdoor
PCboard side?
Check the
transmission wiring
between the outdoor unit PC
board and inverter
unit.
Replace the inverter unit.
NO
Replace K1M.
Replace the inverter unit.
Replace the outdoor unit
PC board.
(VF164)
SI-05C.BOOK Page 328 Monday, November 6, 2000 4:13 PM
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