Daikin 4MXL-T Series User Manual

Troubleshooting for Outdoor Unit SiUS121827E
202 Part 6 Service Diagnosis
7.5 Anti-icing Control for Indoor Unit
Error Code A5
Outdoor Unit LED
Display
A j 1 i 2 h 3 i 4 i 5 h
Method of Error
Detection
During cooling operation, indoor unit icing is detected by checking the temperatures sensed by the
indoor heat exchanger thermistor and room temperature thermistor that are located in a shut-down
room.
Error Decision
Conditions
 In cooling operation, the both conditions (A) and (B) are met for 5 minutes.
(A) Room temperature – Indoor heat exchanger temperature ≥ 10°C (18°F)
(B) Indoor heat exchanger temperature ≤ –1°C (30.2°F)
 If the error repeats, the system is shut down.
 Reset condition: 3-minute standby is over and the indoor heat exchanger temperature is above
0°C (32°F)
Supposed
Causes
 Wrong wiring or piping
 Defective electronic expansion valve
 Short-circuited air
 Defective indoor heat exchanger thermistor
 Defective room temperature thermistor

Daikin 4MXL-T Series Specifications

General

Brand	Daikin
Model	4MXL-T Series
Category	Air Conditioner
Language	English