Daikin FTXS09HVJU, Service Manual

Page: 148 / 274

Troubleshooting SiUS04-904
Service Diagnosis 137
Troubleshooting
Check No.07
Refer to P.147
Check No.08
Refer to P.154
Check No.13
Refer to P.150
(R7270)
Caution
Be s u re to t u rn off the po w er s w itch b efore connecting or disconnecting
the connector, or parts damage may occ u r.
N O
YES
N O
YES
N O
YES
YES
N O
N O
YES
YES
N O
Monitor the s u pply v oltage,
discharge and s u ction press u res,
and other factors for an extended
period of time.
Possi b le ca u ses
Instantaneo u s s u pply v oltage
drop
Compressor motor o v erloaded
Contact-ind u ced electrical
short-circ u it
*
An o u tp u t o v erc u rrent may res u lt from incorrect internal w iring. If the w ires ha v e b een disconnected and
reconnected for part replacement, for example, and the system is interr u pted b y an o u tp u t o v erc u rrent,
check the w ires again.
Check No. 0 8
Check the discharge press u re.
Check No. 13
Check the po w er transistor.
Check No. 07
Check the installation condition.
Check w ith the in v erter checker (
*
).
T u rn off the po w er and disconnect
the harnesses U, V and W .
T u rn off the po w er, and reconnect
the harnesses. T u rn on the po w er
again and get restarted.
T u rn off the po w er and t u rn it on
again to get the system started.
See if the same error occ
u rs.
Check the s u pply v oltage.
Keep on u sing as it is
(monitor).
Check the electrical
connectors and other
fittings.
F u lly open the stop v al v e.
Correct the po w er s u pply.
Replace the compressor.
Correct the po w er s u pply or
replace the SPM.
(Replace the o
u tdoor u nit
PCB.)
Replace the SPM.
(Replace the o
u tdoor u nit
PCB.)
N ormal?
Error again?
Stop v al v e f u lly
open?
V oltage as rated?
Any LED off?
*
In v erter checker
Part N o.: 1225477
Short-circ u it
or b reakage b et w een
compressor's coil phases?