Error Displays - Thermo Scientific EK45 Manuel D'installation

Error Displays

Thermo Scientific
Troubleshooting
Section 6
PFo No sensor is connected or the connected sensor is broken. The unit
cools down to the lowest possible temperature.
PFc The connected sensor has a short circuit. The unit cools down to the
lowest possible temperature.
In case of thermal overload the compressor the compressor shuts down. The
compressor restarts automatically after it has cooled down.
Possible causes for the compressor shutting down:
• high ambient temperature
• poor air quantity for cooling
• compressor needs cleaning, or is defective
• refrigerant leak in the 1st stage of the cooling circuit
To easily check the cooling air flow rate place a sheet of paper on the
ventilator grid suction side when the cooler is in use. The paper should
adhere to the grid.
NOTE For EK90s, after the fault has been eliminated the reset key must be
pressed before restarting the unit.

6-1