Heat Controller A-MMH24FA-1 Self-diagnosis Function, Indoor Error, Outdoor Error, Error Indicator

Troubleshooting Guide

Self-diagnosisFunction

■Error Indicator

•The self-diagnosis function of the air conditioner is used to identify any troubles that may exist.

•Refer to the table below to determine the error code associated with the LED signals given by the indoor air con- ditioner's display.

•If more than two problems occur simultaneously, one error code of most severity is displayed.

•After an error has occurred, if the error is fixed/cleared, the LED display representing the error code (shown in the table below) will also be cleared simultaneously.

•To operate the unit after the occurrence of an error code, it is best to power off the unit and then power on again.

LED1 LED2

Indoor Error

Error code	Description	MPS Variable	LED1	LED2	Indoor Status
00	No Error				ON
01	Indoor Room Thermistor Error		1 time		OFF
02	Indoor In-Piping Error		2 times		OFF
05	Communication Error between In and Out		5 times		OFF
06	Indoor Out-Piping Error		6 times		OFF
07	Differnt mode operation		7 times		OFF
10	Indoor fan motor locked error			1 times	OFF

Outdoor Error

Error code	Description	MPS Variable	LED1(Red)	LED2(Green)	Indoor Status
33	D-Pipe High(Normal)		3 times	3 times	OFF
44	Outdoor Air Thermistor Error(Open/Short)		4 times	4 times	OFF
45	Cond Pipe Thermistor Error(Open/Short)		4 times	5 times	OFF
47	Const. D-Pipe Thermistor Error(Open/Short)		4 times	7 times	OFF
51	Capcity Error(High/Low)		5 times	1 times	OFF

Wall Mounted Multi-Zone Split System Air Conditioner - 64 -