9
d
. Compressor protection when condenser fan motor is locked
When the condenser fan motor is locked, the compressor stops to prevent pressure rise in the
refrigeration circuit.
1) When the condenser fan motor is locked during operation and the condenser outlet
temperature reaches 75°C, the compressor stops.
2) The compressor restarts when the condenser outlet temperature goes down below 55°C
and 20 minutes have passed since the compressor stopped.
3) The above process is repeated until the condenser fan motor is unlocked.
* Even when the condenser outlet temperature reaches 75°C, only the compressor stops and
the condenser fan motor output stays on.
e. Status indication
Use the check mode “C04” to check the operational status of each component.
f. Error indication
When the condenser thermistor error (temperature below -20°C or above 90°C) occurs, the
error code “E51” appears in the display. The fan motor low temperature control (c) and the
compressor protection (d) are not available.
g. Condenser thermistor
Detection range: -20 to 90°C
Open circuit or short circuit when out of the above range.
