Daikin FTKS20D3VMW, Service Manual, Page: 261 / 355

Troubleshooting SiENBE12-713
250 Service Diagnosis
5.12 OL Activation (Compressor Overload)
Remote Control
Display
E5
Outdoor Unit LED
Display A 5 1 4 2 1 3 4 4 1
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.04
Refer to P.277
Check No.05
Refer to P.278
Check No.06
Refer to P.279
Check No.11
Refer to P.282
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.
(R4697)
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
*
Refriger a nt s hort a ge
*
W a ter mixed
*
S top v a lve defective
Check No. 06
Check the thermi s tor s
M a lf u nctioning
F u nctioning
Check No. 04
Check the electronic exp a ntion
v a lve.
M a lf u nctioning
F u nctioning
Check No. 05
Check the fo u r w a y v a lve.
Repl a ce the o u tdoor u nit
PCB.