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Troubleshooting
SiE12-411
186
Service Diagnosis
5.15 Four Way Valve Abnormality
Remote
Controller
Display
EA
Outdoor Unit LED
Display
A
5
1
4
2
1
3
1
4
1
Method of
Malfunction
Detection
The liquid pipe thermistor, the outdoor temperature thermistor and the outdoor unit heat
exchanger thermistor are checked to see if they function within their normal ranges in the
operating mode.
Malfunction
Decision
Conditions
Either of the following conditions occurs 3 minutes after the compressor has started.
"
Cooling / dry operation
(Outdoor unit heat exchanger temperature – Liquid pipe temperature) < –5°C
"
Heating operation
(Liquid pipe temperature – Outdoor unit heat exchanger temperature) < –5°C
Supposed
Causes
"
Connector in poor contact
"
Thermistor defective
"
Outdoor unit PCB defective
"
Four way valve coil or harness defective
"
Four way valve defective
"
Foreign substance mixed in refrigerant
Summary of Contents for Super Multi NX C-Series
Page 6: ...SiE12 411 Table of Contents v Index i Drawings Flow Charts v...
Page 7: ...SiE12 411 vi Table of Contents...
Page 67: ...Specifications SiE12 411 56 Specifications...
Page 171: ...Instruction SiE12 411 160 System Configuration...
Page 225: ...Check SiE12 411 214 Service Diagnosis...
Page 295: ...SiE12 411 iv Index...