Daikin Super Multi Plus E-Series, Service Manual

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SiEN18-622 Troubleshooting for Outdoor Unit
Troubleshooting 363
Troubleshooting
Check No.02
Refer to P.405
NO
YE S
NO
YE S
NO
YE S
Open the s top v a lve.
Repl a ce the low pre ssu re s en s or.
Repl a ce the m a in PCB.
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.
I s the s top
v a lve open?
1
Mo u nt a pre ssu re g au ge on the low-pre ssu re s ervice port.
2
Connect the S ervice Checker.
3
Re s et the oper a tion us ing the remote control, a nd then
re s t a rt the oper a tion.
Are the
ch a r a cteri s tic s of
the low 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.)
· The low 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 low pre ssu re h as re a lly b ecome low.
Check No.2 Referring to inform a tion on p a ge 404, remove the
c aus e s b y which the low pre ssu re h as b ecome low.
* 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 low 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.
+5V
(4)
( 3 )
(2)
(1)
(Bl u e)
Red
White
Connector for low pre ssu re s en s or
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 .
Bl a ck Low
pre ssu re
s en s or