Discharge Pipe Temperature Control - Daikin FTKS20D3VMW Service Manual

Super multi nx
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SiENBE12-713

5.16 Discharge Pipe Temperature Control

F3
Remote Control
Display
Outdoor Unit LED
A
Display
Method of
The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the
Malfunction
temperature being detected by the discharge pipe thermistor.
Detection
Malfunction
2YC45
Decision
If the temperature being detected by the discharge pipe thermistor rises above 120°C, the
compressor will stop. (The error is cleared when the temperature has dropped below 107°C.)
Conditions
" If the compressor stops 6 times straight due to abnormal discharge pipe temperature, the
" The error counter will reset itself if this or any other error does not occur during the following
" Refrigerant shortage
Supposed
" Four way valve malfunctioning
Causes
" Discharge pipe thermistor defective
" 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.06
Refer to P.279
Check No.11
Refer to P.282
Service Diagnosis
5
1
4
2
1
3
4
4
system will be shut down.
60-minute compressor running time (total time).
(heat exchanger or outdoor temperature thermistor defective)
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check No. 06
Check the thermistors.
Functioning
Check No. 04
Check the electronic expansion
valve.
Functioning
Check No. 11
Check the refrigerant line.
Functioning
1
Malfunctioning
Discharge pipe thermistor
Outdoor unit heat exchanger thermistor
Outdoor temperature thermistor
Malfunctioning
Malfunctioning
Refrigerant shortage
Four way valve malfunctioning
Water mixed
Stop valve defective
Troubleshooting
Replace a defective
thermistor.
Replace the valve itself or
the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R4700)
255

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