Installation instructions

10
TROUBLESHOOTING
For ease of service, the systems are equipped with diagnostic code
display LEDs on both the indoor and outdoor units. The indoor
diagnostic display is a combination of flashing LEDs on the
display panel or the front of the unit.
Some indoor units display error codes specifying failure modes in
outdoor units. If possible, always check the diagnostic codes
displayed on the indoor unit first.
The diagnostic codes displayed in the indoor and outdoor units are
listed in the tables below.
INDOOR UNIT DIAGNOSTIC GUIDES
Table7—IDUnitsErrorCodeDisplay
OPERATION LAMP TIMER LAMP DISPLAY LED STATUS
☆ 1time
X E0 Indoor unit EEPROM parameter error
☆ 2times
X E1 Indoor / outdoor units communication error
☆ 3times
X E2 Zero--- crossing signal detection error
☆ 4times
X E3 I ndoor fan speed is out of control
☆ 5times
X E4 Indoor room temperature sensor T1 open circuit or short circuit
☆ 6times
X E5 Evaporator coil temperature sensor T2 open circuit or short circuit
☆ 7times
X EC Refrigerant leakage detection
☆1time
O F0 Overload current protection
☆ 2times
O F1 Ou tdoor ambient temperature sensor T4 open circuit or short circuit
☆ 3times
O F2 Condenser coil temperature sensor T3 open circuit or short circuit
☆ 4times
O F3 Compressor discharge temperature sensor T5 open circuit or short circuit
☆ 5times
O F4 Outdoor unit EEPROM parameter error
☆ 6times
O F5 Outdoor fan speed is out of control
☆ 1time ☆
P0 IPM malfunction or IGBT over--- strong current protection
☆ 2times ☆
P1 Over voltage or over low voltage protection
☆ 3times ☆
P2
High temperature protection of the compressor top diagnosis and solution
(only for 9k,12k models)
☆ 5times ☆
P4 Inverter compressor drive error
O (on -- light) X(off -- light) ☆(flash)
For additional diagnostic information, refer to the Service Manual
Copyright 2015 Carrier Corporation S 7310 W. Morris St. S Indianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No: 40MAQ---01SI
Replaces: New
Edition Date: 12/15