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SiBE12-519
Troubleshooting
Service Diagnosis
151
4.12
Discharge Pipe Temperature Control
Remote
Controller
Display
F3
Method of
Malfunction
Detection
The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the
temperature being detected by the discharge pipe thermistor.
Malfunction
Decision
Conditions
If the temperature being detected by the discharge pipe thermistor rises, the compressor will
stop. The temperature at which the compressor halts varies according to the frequency.
(1) 110°C when the frequency is above 45Hz on ascending or above 40Hz on descending.
(2) 102°C when the frequency is between 30Hz and 45Hz on ascending or between 40Hz and
25Hz on descending.
(3) 98°C when the frequency is below 30Hz on ascending or below 25Hz on descending.
The error is cleared when the temperature has dropped below 97°C.
If the compressor stops 6 times successively due to abnormal discharge pipe temperature,
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).
Supposed
Causes
Refrigerant shortage
Four way valve malfunctioning
Discharge pipe thermistor defective
(heat exchanger or outdoor temperature 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.171
Check No.06
Refer to P.173
Check No.11
Refer to P.176
Replace a defective
thermistor.
Replace the valve itself or
the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R4700)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check No. 06
Check the thermistors.
Malfunctioning
z
Discharge pipe thermistor
z
Outdoor unit heat exchanger thermistor
z
Outdoor temperature thermistor
z
Refrigerant shortage
z
Four way valve malfunctioning
z
Water mixed
z
Stop valve defective
Malfunctioning
Functioning
Functioning
Functioning
C
heck No.
11
Check the refrigerant line.
Malfunctioning
C
heck No.
04
Check the electronic expansion
valve.
Summary of Contents for 2MKS40DVMB
Page 10: ...SiBE12 519 List of Functions 1 Part 1 List of Functions 1 Cooling Only 2 2 Heat Pump 4 ...
Page 15: ...Heat Pump SiBE12 519 6 List of Functions ...
Page 29: ...Heat Pump SiBE12 519 20 Specifications ...
Page 135: ...Instruction SiBE12 519 126 System Configuration ...
Page 211: ...Outdoor Unit SiBE12 519 202 Removal Procedure ...