Daikin FTKS20CVMB(9), Руководство по обслуживанию

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SiENBE04-512A Troubleshooting
Service Diagnosis 129
4.21 Over-voltage Detection
Remote Control
Display
U2
Method of
Malfunction
Detection
An abnormal voltage rise is detected by checking the specified over-voltage detection circuit.
Malfunction
Decision
Conditions
„
An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer
(The voltage is over 400V).
„
The system will be shut down if the error occurs 255 times.
„
Clearing condition: Continuous run for about 10 minutes (normal)
Supposed
Causes
„
Supply voltage not as specified
„
Over-voltage detection circuit defective
„
PAM control part(s) defective
Troubleshooting
Note: If the model doesn’t have SPM, replace the outdoor unit PCB.
Check the su pply volt a ge.
Correct the power su pply.
Check for su ch f a ctor s for a
long term.
Repl a ce the S PM.
(Repl a ce the o u tdoor u nit
PCB.)
(R2957)
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.
Su pply volt a ge as
s pecified?
NO
YE S
T u rn on the
power a g a in.
Error di s pl a yed a g a in?
YE S
NO
Di s t u r ba nce f a ctor s
∗
Noi s e
∗
Power su pply di s tortion
Repe a t a
co u ple of time s .
SiENBE04-512A.book Page 129 Friday, October 5, 2007 1:49 PM