Carrier 12000 Manuel D'installation page 16

Problem
The unit is not working
The unit starts and stops
frequently
Poor heating performance
Indicator lamps continue
flashing
Error code appears and
begins with the letters as
the following in the window
display of indoor unit:
• E (x), P (x), F (x)
• EH (xx), EL (xx), EC (xx)
• PH (xx), PL (xx), PC (xx)
NOTE: If your problem persists after performing the checks and diagnostics above, turn off your unit
immediately and contact an authorized service center.
Page 16-GB
Possible Causes
Power failure
The power is turned off
The fuse is burned out
Remote control batteries are
dead
The Unit's 3-minute protection
has been activated
Timer is activated
There's too much or too little
refrigerant in the system
Incompressible gas or moisture
has entered the system.
System circuit is blocked
The compressor is broken
The voltage is too high or too low
The outdoor temperature is
extremely low
Cold air is entering through doors
and windows
Low refrigerant due to leak or
long-term use
The unit may stop operation or continue to run safely. If the indicator
lamps continue to flash or error codes appear, wait for about 10
minutes. The problem may resolve itself.
If not, disconnect the power, then connect it again. Turn the unit on.
If the problem persists, disconnect the power and contact your nearest
customer service center.
Solution
Wait for the power to be restored
Turn on the power
Replace the fuse
Replace batteries
Wait three minutes after restarting
the unit
Turn timer off
Check for leaks and recharge the
system with refrigerant.
Evacuate and recharge the system
with refrigerant
Determine which circuit is blocked
and replace the malfunctioning
piece of equipment
Replace the compressor
Install a manostat to regulate the
voltage
Use auxiliary heating device
Make sure that all doors and
windows are closed during use
Check for leaks, re-seal if
necessary and top off refrigerant