High Pressure Control In Cooling - Daikin SUPER MULTI NX G Series Service Manual

SiUS12-928_A

5.17 High Pressure Control in Cooling

F6
Remote
Controller
Display
Outdoor Unit LED
A 5
Display
Method of
High-pressure control (operation halt, frequency drop, etc.) is activated in cooling mode if the
Malfunction temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.
Detection
 The temperature sensed by the outdoor heat exchanger thermistor rises above
Malfunction
 The error is cleared when the temperature drops below
Decision
Conditions
 The installation space is not large enough.
Supposed
 Defective outdoor unit fan
Causes
 Defective electronic expansion valve
 Defective outdoor heat exchanger thermistor
 Defective outdoor unit PCB
 Defective stop valve
 Dirty outdoor heat exchanger
Service Diagnosis
1 4 2 1 3 4 4 4
18 class
65°C (149°F)
47.5°C (118°F)
24/32 class
65°C (149°F)
49°C (120°F)
Troubleshooting
.
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