CHAPTER 5. DIAGNOSTICS 41
Compressor does not run at the selected speed
Problem Action
High compression load, with compressor
being subjected to a stall condition.
·Review system design,refrigerant gas
load or compressor capacity is not
suitable for the application. If system is
apropriated designed, speed will reach
set value when load condition is
stabilized.
Compressor always on pulldown cycle for
Drop-In Mode.
·In Drop-In mode, check if the inverter
AC input is connected to thermostat
output. Inverter AC input should be
directly connected to AC power supply
(see Drop-In mode schematic).
No or incorrect control signal.
·Check if the appropriate control signal is
being correctly applied to the Control
Input Connection.
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