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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 fault codes.
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 fault codes are the mentioned which is as follows:
• Electrical Controls
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
Function Description Display code
Over heating 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).
°F
Freeze Protection
This feature prevents freezing of room at low
temperature.
°F
Remote Mode When use the remote mode operation
°F
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