SM619PHA-03 Specifications subject to change without notice. 19
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 10.
Table 10 — Error Codes
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.
DISPLAY ERROR INFORMATION SOLUTION
E0/EA Indoor unit EEPROM parameter error Page 27
E1 Indoor / outdoor units communication error Pages 28 - 29
E2 Zero crossing detection error diagnosis and solution Page 30
E3 The indoor fan speed is operating outside of the normal range Page 31
E4 Indoor room temperature sensor T1 is in open circuit or has short circuited Page 37
E5 Evaporator coil temperature sensor T2 is in open circuit or has short circuited Page 37
EB Communication error between the indoor PCB and display board Page 38
EF Occupancy Sensor module error Page 33
F0 Overload current protection Page 39
F1 Outdoor ambient temperature sensor T4 open circuit or short circuit Page 37
F2 Condenser coil temperature sensor T3 is in open circuit or has short circuited Page 37
F3 Compressor discharge temperature sensor TP open circuit or short circuit Page 37
F4 Outdoor unit EEPROM parameter error Page 27
F5 The outdoor fan speed is operating outside of the normal range Page 31
P0 IPM malfunction or IGBT over-strong current protection Page 40
P1 Over voltage or over low voltage protection Page 34
P2 High temperature protection of IPM module Page 35
P3 Outdoor ambient temperature is too low
P4 Inverter compressor drive error Page 36
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