Daikin FTKS20CVMB(9), Service Manual

Page: 120 / 248

SiENBE04-512A Troubleshooting
Service Diagnosis 111
4.10 Input Over Current Detection
Remote Control
Display
E8
Method of
Malfunction
Detection
An input over-current is detected by checking the input current value with the compressor
running.
Malfunction
Decision
Conditions
„
The following current with the compressor running continues for 2.5 seconds.
Cooling / Heating: Above 12A
Supposed
Causes
„
Over-current due to compressor failure
„
Over-current due to defective power transistor
„
Over-current due to defective outdoor unit PCB
„
Error detection due to outdoor unit PCB
„
Over-current due to short-circuit
Troubleshooting
Check No.7
Refer to P.133
Check No.8
Refer to P.133
Note: If the model doesn’t have SPM, replace the outdoor unit PCB.
Repl a ce the o u tdoor u nit
PCB.
∗
Inverter checker
P a rt No.: 1225477
Correct the power su pply or
repl a ce the S PM.
(Repl a ce the o u tdoor u nit
PCB.)
(R2952)
Caution
Be su re to t u rn off power s witch b efore connect or di s connect connector,
or p a rt s d a m a ge m a y b e occ u rred.
Inp u t c u rrent flowing
ab ove it s s top level?
NO
YE S
Any LED off?
YE S
NO
Check with the inverter checker (
∗
).
T u rn off the power, a nd reconnect
the h a rne ss e s . T u rn on the power
a g a in a nd get re s t a rted.
T u rn off the power a nd di s connect
the h a rne ss e s U, V a nd W.
Get re s t a rted a nd me asu re the
inp u t c u rrent.
Check No. 8
Check the di s ch a rge pre ssu re.
Check No. 7
Check the in
s t a ll a tion condition.
∗
An inp u t over-c u rrent m a y re su lt from wrong intern a l wiring. If the wire s h a ve b een di s connected a nd
reconnected for p a rt repl a cement, for ex a mple, a nd the s y s tem i s interr u pted b y a n inp u t over-c u rrent,
t a ke the following proced u re.
SiENBE04-512A.book Page 111 Friday, October 5, 2007 1:49 PM