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Si21-205
Troubleshooting for Outdoor Unit (25/35 class)
Troubleshooting
169
6.5
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 a stop takes place 6 times successively due to abnormal discharge pipe temperature, the
system will be shut down.
If the temperature being detected by the discharge pipe thermistor rises above
˚C, the
compressor will stop. (The error is cleared when the temperature has dropped below
˚C.)
Stop temperatures
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 air temperature thermistor defective)
Outdoor unit PCB defective
Water mixed in the local piping
Electronic expansion valve defective
Stop valve defective
Troubleshooting
Check No.4
Refer to P.187
Check No.6
Refer to P.189
Check No.11
Refer to P.192
(1) above 45Hz (rising), above 40Hz (dropping)
120
80
(2) 130~45Hz (rising), 25~40Hz (dropping)
110
70
(3) below 30Hz (rising), below 25Hz (dropping)
105
65
Replace a defective
thermistor.
Replace the valve itself or
the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R2846)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check No. 6
Check the thermistors.
Malfunctioning
l
Discharge pipe thermistor
l
Outdoor unit heat exchanger thermistor
l
Outdoor temperature thermistor
l
Refrigerant shortage
l
Four way valve malfunctioning
l
Water mixed
l
Stop valve defective
Malfunctioning
Functioning
Functioning
Functioning
C
heck No.
11
Check the refrigerant line.
Malfunctioning
C
heck No.
4
Check the electronic expansion
valve.
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
Page 15: ...Models Si21 205 4 Model Name and Power Supply ...
Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...
Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...
Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...
Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...
Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...
Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...