Carrier 38MPRA Series Service Manual page 21

Troubleshooting (continued)
Error Display (Indoor Unit)
When the indoor unit encounters a recognized error, the indicator light flashes in a corresponding series, the timer display may turn on or
begin flashing, and an error code displays. These error codes are described in Table 17.
DISPLAY
Indoor unit EEPROM parameter error
E0/EA
Indoor / outdoor units communication error
E1
Zero crossing detection error diagnosis and solution
E2
The indoor fan speed is operating outside of the normal range
E3
Indoor room temperature sensor T1 is in open circuit or has short circuited
E4
Evaporator coil temperature sensor T2 is in open circuit or has short circuited
E5
Communication error between the indoor PCB and display board
EB
Occupancy Sensor module error
EF
Overload current protection
F0
Outdoor ambient temperature sensor T4 open circuit or short circuit
F1
Condenser coil temperature sensor T3 is in open circuit or has short circuited
F2
Compressor discharge temperature sensor TP open circuit or short circuit
F3
Outdoor unit EEPROM parameter error
F4
The outdoor fan speed is operating outside of the normal range
F5
IPM malfunction or IGBT over-strong current protection
P0
Over voltage or over low voltage protection
P1
High temperature protection of IPM module
P2
Outdoor ambient temperature is too low
P3
Inverter compressor drive error
P4
For other codes
The display board may show a garbled code or a code undefined by the service manual. Ensure that this code is not a temperature reading.
Troubleshooting
Test the indoor unit using the remote control. If the unit display is working however will not respond to the remote, the indoor PCB needs to be
replaced. If there is no display after pressing LED and the unit responds, the display board needs to be replaced.
SG-38MPRA-02
Table 17 — Error Codes
ERROR INFORMATION
Specifications subject to change without notice.
SOLUTION
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