Nidec Embraco CF01F - Diagnostics; LED Diagnosis Function

5. DIAGNOSTICS
5.1. LED Diagnosis Function
The CF01F and CF02F Inverters have two diagnostics methods, by visual light emission using
a LED indication, or by serial communication protocol. The LED diagnostic unit can be seen
through the translucent cover, which also provides the basic information for diagnostic. This
function helps service technicians to diagnose possible fault components by blinking a green
LED inside the box. Basically, it indicates if there is a problem with the compressor, the
Inverter, or the Thermostat. The table below describes the failure modes.
LED Pattern
Period
Status Description
1 flash
15 seconds
Normal operation
2 flashes
5 seconds
Control communication problem
3 flashes
5 seconds
Inverter problem
4 flashes
5 seconds
Compressor problem
1 flash
0.5 seconds
Temperature protection active
Table 22 – LED diagnosis pattern
NOTICE
● This LED feature is available on CF01F and CF02F Inverters and can be
implemented under customer request. In case of doubts, please get in contact
with your Nidec GA Application Engineer.
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