Fisher FSAI-Pro-91AE2 Service Manual page 45

unoccupied for a long time in severe cold weather.
8.4.11 Frequency limitation protection
V
Normal
VOLT_RST1_ADD
VOLT_LIM1_ADD
VOLT_LIM_FREQ1_ADD
VOLT_RST2_ADD
VOLT_LIM2_ADD
VOLT_LIM_FREQ2_ADD
The PCB will detect the voltage of power supply and adjust the compressor running frequency to
protect the system.
In the first 10 seconds after power on, this protection is inactive.
When this protection happens, it will last 3 minutes and then the PCB will detect the power supply
voltage again.
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