Ownerʼs Manual
15
ENGLISH
Control Locations
Self-Diagnosis
FUNCTION:
If the unit has a malfunction, a green OPERATION LED located on the Display PCB used by the unit to
indicate the errors.
USE:
If the customer has to register a complaint to the service center, he can be very clear about registering
the complaint that what is happening & by referring the user's manual the customer can clearly define
the problem.
So that the engineer should go fully prepared with the prescribed tools to be used regarding that
problem. It also keeps the customer aware about the unit.
Here are some of the problems defined below for which the LED indicates by flashing number of times
the error has been recorded against it.
The errors are the mentioned which is as follows:
• Electrical Controls
ON
Normal
OFF
No power / failed board
Fault Codes
CH 01
Indoor Air Thermistor Error
CH 02
Indoor Coil Thermistor Error
CH 03
Outdoor Air Thermistor Error (PTHP Only)
CH 04
Outdoor Coil Thermistor Error (PTHP Only)
CH 05
Mode Error
CH 06
Set point Error
CH 07
Bad Thermistor Wiring
CH 09
Pressure Switch Error
• Manual Controls
ON
Normal
OFF
No power / failed board
Fault Codes
1
Indoor Air Thermistor Error
2
Indoor Coil Thermistor Error
3
Outdoor Air Thermistor Error (PTHP Only)
4
Outdoor Coil Thermistor Error (PTHP Only)
5
Mode Error
6
Set point Error
7
Bad Thermistor Wiring
LED Flash Rate
0.25 sec On per flash, 0.25 sec OFF between flashes,
2.00 sec OFF between codes.
