Daikin 4MXS36NMVJU Service Manual

SiUS121630EA Troubleshooting for Outdoor Unit
Service Diagnosis 167
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 4MXS36NMVJU Specifications

General

Model	4MXS36NMVJU
Category	Air Conditioner
Heating Seasonal Performance Factor (HSPF)	4.0
Number of Connectable Indoor Units	4
Seasonal Energy Efficiency Ratio (SEER)	6.0
Refrigerant	R32
Indoor Units Compatibility	Compatible with various indoor units
Indoor Unit Dimensions (HxWxD)	Varies by model
Indoor Unit Weight	Varies depending on the connected indoor unit model
Operating Temperature (Cooling)	-10 to 46 °C
Operating Temperature (Heating)	-15 to 24 °C
Type	Multi-Split System