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Control Locations
Owner’s Manual 15
ENGLISH
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.
The errors are the mentioned which is as follows:
• Electrical Controls
• Overheating Protection
This feature prevents melting of unit by electrical heater located inside of the unit at the remote
mode (when the unit is connected with wall thermostat). LED on the control panel displays
"OP"
• Freeze Protection
This feature prevents freezing of room at low temperature.
LED on the control panel displays "FP"
NOTICE
ON Normal
OFF No power / failed board
Fault Codes
CH 01
Indoor Air Thermistor Error
CH 02
Indoor Coil Thermistor Error
CH 07
Themostat Wiring Error
CH 09
EEPROM Check Sum Error
CH 10
Indoor Fan Error
CH 34
High Pressure Switch Error
CH 44
Outdoor Air Thermistor Error (PTHP Only)
CH 45
Outdoor Coil Thermistor Error (PTHP Only)
CH 67
Outdoor Fan Error
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