Daikin FTKS50BVMB, Service Manual

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SiEN18-622 Troubleshooting for Outdoor Unit
Troubleshooting 361
Troubleshooting
Check No.01
Refer to P.404
NO
YE S
YE S
YE S
NO
NO
YE S
NO
YE S
NO
+5V
(4)
( 3 )
(2)
(1)
Red
White
Check for the point s s hown b elow.
1
I s the s top v a lve open?
2
I s the HP S connector properly connected to the
m a in PCB?
3
Doe s the high pre ssu re s witch h a ve contin u ity?
Are the
three point s
ab ove OK?
· Mo u nt a pre ssu re g au ge on the high-pre ssu re s ervice port.
· Connect the S ervice Checker.
· Re s et the oper a tion us ing the remote control,
a nd then re s t a rt the oper a tion.
Doe s the s top
d u e to m a lf u nction (E 3 )
rec u r?
I s the HP S
oper a ting v a l u e norm a l
(i.e., 4.0MP a )?
Are the
ch a r a cteri s tic s of the high
pre ssu re s en s or norm a l?
( S ee * 1.)
I s the
pre ssu re detected with
the PCB norm a l? ( S ee * 2.)
Repl a ce the HP S .
Rectify defective point s , if a ny.
Repl a ce the high pre ssu re s en s or.
Repl a ce the m a in PCB.
· The high pre ssu re s en s or i s norm a l, a nd the pre ssu re detected with the PCB i s a l s o norm a l.
· The high pre ssu re h as re a lly b ecome high.
Check No.01
Referring to inform a tion on p a ge 404, remove the c aus e s b y
which the high pre ssu re h as b ecome high.
* 1: M a ke a comp a ri s on b etween the volt a ge of the pre ssu re s en s or a nd th a t re a d b y the
pre ssu re g au ge.
(A s to the volt a ge of the pre ssu re s en s or, m a ke me asu rement of volt a ge a t the
connector, a nd then convert it to pre ssu re a ccording to inform a tion on p a ge 409.)
* 2: M a ke a comp a ri s on b etween the high pre ssu re v a l u e checked with the S ervice Checker
a nd the volt a ge of the pre ssu re s en s or ( s ee * 1).
*3 : M a ke me asu rement of volt a ge of the pre ssu re s en s or.
Connector for high
pre ssu re s en s or (Red)
Micro controller
A/D inp u t
M a ke me asu rement of DC
volt a ge b etween the s e wire s .
High
pre ssu re
s en s or
Bl a ck
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.