Daikin ARKH20CVMB7, Service Manual

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Troubleshooting SiENBE04-512A
108 Service Diagnosis
4.7 OL Activation (Compressor Overload)
Remote Control
Display
E5
Method of
Malfunction
Detection
A compressor overload is detected through compressor OL.
Malfunction
Decision
Conditions
„
If the compressor OL is activated twice, the system will be shut down.
„
The error counter will reset itself if this or any other error does not occur during the following
60-minute compressor running time (total time).
∗
The operating temperature condition is not specified.
Supposed
Causes
„
Refrigerant shortage
„
Four way valve malfunctioning
„
Outdoor unit PCB defective
„
Water mixed in the local piping
„
Electronic expansion valve defective
„
Stop valve defective
Troubleshooting
Check No.4
Refer to P.130
Check No.5
Refer to P.131
Check No.6
Refer to P.132
Check No.11
Refer to P.135
In s ert the thermi s tor in
po s ition.
Repl a ce the di s ch a rge pipe
thermi s tor.
Repl a ce the v a lve it s elf or
the coil.
Repl a ce the fo u r w a y v a lve
coil or the v a lve it s elf.
Repl a ce the o u tdoor u nit
PCB.
Refer to the refriger a nt line
check proced u re.
Repl a ce the o u tdoor u nit
PCB.
(R2 8 41)
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.
Di s ch a rge pipe thermi s tor
di s connected?
YE S
M a lf u nctioning
∗
Di s ch a rge pipe thermi s tor
NO
F u nctioning
F u nctioning
Check No. 11
Check the refriger a nt line.
M a lf u nctioning
Check No. 6
Check the thermi s tor s
M a lf u nctioning
F u nctioning
Check No. 4
Check the electronic exp a ntion
v a lve.
M a lf u nctioning
F u nctioning
Check No. 5
Check the fo u r w a y v a lve.
∗
Refriger a nt s hort a ge
∗
W a ter mixed
∗
S top v a lve defective
SiENBE04-512A.book Page 108 Friday, October 5, 2007 1:49 PM