17
Versa Drawer Refrigeration Units
SYMPTOM
CAUSE/REMEDY
Unit is noisy.
Check for loose or broken fan blades.
Check for ice buildup on the evaporator coil.
Inspect the compressor mounts.
Check for loose or missing screws on the compressor compartment louvers.
Unit runs continuously.
Clean the condenser coils.
Check the drawer gaskets.
Check to determine if the box temperature sensor is open or shorted.
Check refrigerant charge.
Check the compressor.
Check the evaporator fans.
Unit short cycles.
Check the drawer gaskets.
Check to determine if the box temperature sensor is open or shorted.
Check refrigerant charge.
Check the compressor.
Check condenser fans.
Check TXV.
Unit evaporator coils are
Clean the condenser coils.
freezing up.
Check the drawer gaskets.
Check to determine if the box temperature sensor is open or shorted.
Check refrigerant charge.
Check the evaporator fans and air flow.
Check to assure that the hot gas loop is more than 1 inch away from
either end of the evaporator drain pan.
Check the TXV.
Water on floor outside the unit.
Check the evaporator drain pan and drain lines.
Check the condensate drain pan.
Make sure the condensate wicks are not missing.
Water inside the unit.
Check the evaporator drain pan and drain lines.
Verify proper condensate removal.
Verify proper condensate pan installation.
Unit is showing “Drawer Open”
Close drawer.
on the display.
Check drawer switch.
Check control.
Unit is showing “Out of
Check to determine that the unit is in the correct mode of operation.
Temperature Range” on
Check to determine that the unit is set at the desired set point.
the display.
Check to determine if the box temperature sensor is open or shorted.
Check to determine if any drawers are open.
The unit has power but
Check voltage at the display plug on the control.
the display is not lit.
If there is voltage at the display plug on the control board, replace the
display board.
If there is not voltage at the display plug on the control board, replace the
control board.
Unit alarm is sounding
Press the
i
(Enter) button on the display once to make the alarm quit. This
after losing power.
will then show on the display the time that the unit last had power and
the time that the unit had power restored. Press the
i
(Enter) button
again to show the main display screen.
Unit alarm is sounding –
Check the unit pressures.
compressor is failing.
Check the suction line pressure transducer.
