Daikin FTXM-V Series, Service Manual

Page: 136 / 172

Troubleshooting SiUS042113E
132 Part 6 Service Diagnosis
Troubleshooting
(R21438)
Caution
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An o u tp u t overc u rrent may res u lt from wrong internal wiring. If the system is interr u pted by an o u tp u t
overc u rrent after the wires have been disconnected and reconnected for part replacement, check the
wiring again.
Check No. 22
Check No. 17
Check No.15
T u rn off the power and disconnect
the harnesses U, V, and W.
T u rn off the power, and reconnect
the harnesses. T u rn on the power
again and start operation.
T u rn off the power. Then, t u rn on
the power to restart the system.
See if the same error occ
u rs.
Check the power s u pply voltage.
Monitor the power s u pply voltage,
discharge and s u ction press u res,
and other factors for a long term.
Possible ca u ses
Momentary drop of power s u pply
voltage
Compressor overload
Short circ u it
Check the installation condition.
Check with the inverter analyzer.
Check the power mod u le.
Not a malf u nction.
Keep observing.
Check the connectors and
other components.
F u lly open the stop valve.
Correct the power s u pply.
Replace the compressor.
Correct the power s u pply
or replace the o u tdoor u nit
PCB (main PCB).
Replace the o u tdoor u nit
PCB (main PCB).
Error again?
Stop valve f u lly open?
Voltage as rated?
Any LED off?
Normal?
Inverter analyzer:
RSUK0917C
Short circ u it or
wire breakage between
compressor's coil
phases?
Be s u re to t u rn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check the discharge
press
u re.
Go to Check No. 18 .