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F3 – COMPRESSOR OUT-OF-STEP ERROR
Cause of Error
Tools Required
Possible Broken Part
Troubleshooting
Procedures
Cause: The module panel will constantly test the current of lead
wires of the compressor and calculate the position of the rotator
of the compressor. When the compressor deviates far from the
normal operating status , it will indicate "compressor out-of-
step error" because the current of the compressor wires is too
high or it cannot detect the position of the rotator. This error
always follows "module protection error".
Inspection path: supply voltage → Compressor wire, reactor
wire → System blocked → Module panel damaged → Outdoor
unit control panel destroyed → Compressor destroyed
Multimeter, pressure gauge, module panel in normal condition
Supply voltage, compressor wire, reactor, system pressure,
module panel, outdoor unit control panel, compressor
Check if the supply voltage unstable or volatile. High
1.
system pressure will cause rotation problems to the
compressor.
Is the module panel fixed to the radiator firmly? Will it
2.
cause pool cooling? Is the internal and external heat
exchanger dirty? If "compressor out-of-step error" is
indicated immediately after starting up, observe if there
is any component destroyed by a strike arc near the
module panel; use the multimeter to test if the
resistances between any two compressor wires are the
same. Use the megameter to measure if the resistance
insulation of the three compressor wires against the
ground wire is good
(normally at MΩ level).
Test if the power supply on the module panel is stable
3.
and exclude the module panel error caused by power
supply of the outdoor unit control panel.
Change the module panel, if it is normal, then the
4.
original module panel is destroyed.
If there is only electromagnetic sound and the
5.
compressor does not work; or an irregular sound appears
after the compressor works for a while and then it shuts
down; the compressor may be blocked or destroyed.
Consider replacing the compressor.
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