EcoNet P16AZ24A - Page 45

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Short cycling of
compressor (cont.)
Low charge Check system charge.
Dirty coil
Duct too small or restricted
Faulty internal overload Replace compressor.
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Voltage present on
load side of inverter
and compressor
won't run
Communication failure from VSODC to inverter. Check communication harness connectors and wire
continuity.
Compressor windings Check for correct ohms.
187 – 252VAC
present at input to
inverter
Thermostat Check for control voltage to contactor coil.
Compressor control circuit High-pressure switch
Low-pressure cut-out
Ambient thermostat
Stater heat is active
No voltage at input
to inverter
Blown fuses or tripped circuit breaker Check for short in wiring or unit.
Improper wiring Recheck wiring diagram.
Improper voltage High voltage Wrong unit
Power supply problem
Low voltage Wrong unit
Power supply problem
Wiring undersized
Loose connections
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Liquid in the com -
pressor shell
Faulty stator heat circuit (single leg output
to compressor)
Too much liquid in
system
Incorrect piping
Check piping guidelines.
Overcharge
Check and adjust charge.
9.3 Service Analyzer Charts (cont.)
9.0 DIAGNOSTICS & TROUBLESHOOTING
Diagnostics