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Carrier Air Conditioner Owner's Manual page 11

High-wall fan coil unit
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PROBLEM
Unit/System Does Not Work
Cooling is Not Working Properly
Heating is Not Working Properly
Unit Stops During Operation
LEGEND
LED — Light Emitting Diode
TYPE OF PROTECTION
Indoor Coil High Temperature Protection
Indoor Coil Freeze Up Protection
Discharge Gas High Temperature Protection
Frequent Compressor Cycling
During heating operation the unit may defrost to remove
ice that might collect on the outdoor unit. During defrost,
the indoor fan will automatically stop, the louver will be
fixed at a horizontal position and can not be changed until
the defrost cycle is completed. Forcing the louver to
change its position during defrost could result in equipment
damage.
Fill out the following to save time on any future service calls.
Dealer's Name _____________________________________________________________________________________________
Address ___________________________________________________________________________________________________
Telephone _________________________________________ Purchase Date _________________________________________
Indoor Model #_____________________________________ Outdoor Model #_______________________________________
Indoor Serial # _____________________________________ Outdoor Serial # _______________________________________
Table 3 — Troubleshooting
POSSIBLE CAUSE
• The circuit breaker has tripped or a fuse has
blown.
• Power failure.
• Green or Orange LED is flashing on and off,
which could indicate an indoor or outdoor unit
fault.
• Voltage is too low.
• The filter is blocked with dust.
• Temperature is not set properly.
• A window or door is open.
• The outdoor unit is obstructed.
• The fan speed is too low.
• The operation mode is in Fan or Auto instead of
Cool.
• The filter is blocked with dust.
• Temperature is set too low.
• A window or door is open.
• The outdoor unit is obstructed.
• The Off timer is not operating correctly.
• Green or Orange LED is flashing on and off,
which could indicate an indoor or outdoor unit
fault.
Table 4 — Unit Protection Devices
EFFECT OF PROTECTION
Compressor speed slow down or off
Compressor speed slow down or off
Compressor speed slow down or off
Compressor time delay
• Reset the circuit breaker or replace the fuse with the
specified replacement fuse.
• Restart operation when the power is restored.
• Call your service representative.
• Call your service representative.
• Clean the air filter.
• Check the temperature and reset if necessary.
• Close the window or door.
• Remove the obstruction.
• Change the fan speed selection.
• Change the operating mode to Cool or reset the unit.
• Clean the air filter.
• Check the temperature and reset if necessary.
• Close the window or door.
• Remove the obstruction.
• Restart the operating mode.
• Call your service representative.
11
SOLUTION
OPERATING MODE
Heating and Auto mode at high
outdoor temperatures
Cooling, Dehumidification and Auto mode
at low outdoor temperatures
Cooling, Heating, Dehumidification and
Auto mode outdoor temperatures
All

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