Daikin Super Multi NX B series User Manual

Si12-308 Troubleshooting
Service Diagnosis 189
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

Daikin Super Multi NX B series Specifications

General

Brand	Daikin
Model	Super Multi NX B series
Category	Air Conditioner
Language	English