Sinclair SCV-EB Series Service Manual page 75

5.28 Inverter module Troubleshooting for single-phase models
5.28.1 Digital display output
5.28.2 Description
 L0 indicates Inverter or compressor protection
L1 indicates DC bus low voltage protection
L2 indicates DC bus high voltage protection
L3 indicates current sampling error of PFC circuit
L4 indicates rotating stall protection
L5 indicates zero speed protection
L7 indicates phase loss protection of compressor
 Heat pump stops running.
 Specific error code L0, L1, L2, L3, L4, L5, L7 are displayed on the user interface and the main control board of
refrigerant system.
The specific error codes can also be obtained from the LED indicators on the inverter module.
LED1 flashing pattern (RED)
Flashes 1 times and stops for 0.4s, then repeats
Flashes 2 times and stops for 0.4s, then repeats
Flashes 3 times and stops for 0.4s, then repeats
Flashes 3 times and stops for 0.4s, then repeats
Flashes 4 times and stops for 0.4s, then repeats
Flashes 5 times and stops for 0.4s, then repeats
Flashes 5 times and stops for 0.4s, then repeats
Flashes 6 times and stops for 0.4s, then repeats
LED location of inverter module
Inverter Module(5-9KW): LED1
L0 indicates Inverter or compressor protection(overcurrent)
L0 indicates Inverter or compressor protection(overheated)
L1 indicates DC bus low voltage protection
L2 indicates DC bus high voltage protection
L3 indicates current sampling error of PFC circuit
L4 indicates rotating stall protection
L5 indicates zero speed protection
L7 indicates phase loss protection of compressor
Corresponding error
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