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11. Troubleshooting Guide
Problem
Possible Cause
Possible Solution
Case temperature is
too warm.
Ambient conditions may
be affecting the case
operation.
Check case position in store. Is the case located near an
open door, window, electric fan or air conditioning vent that
may cause air currents? Case must be located minimum
15 Ft away from doors or windows. Cases are designed to
operate at 55% Relative humidity and a temperature of 75°F.
Discharge air temp is out
of spec.
Check evaporator fan operation. Check electrical connections
and input voltage.
Fans are installed backwards. Check airfl ow direction.
Fan blades are installed incorrectly. Make sure fan blades
have correct pitch and are per specifi cation.
Check to see that fan plenum is installed correctly. It should
not have any gaps.
Check suction pressure and insure that it meets factory
specifi cations.
Case is in defrost.
Check defrost settings. See Technical Specifi cations section.
Product load may be over
its limits blocking airfl ow.
Redistribute product so it does not exceed load level. There
is a sticker on the inside of the case indicating what the
maximum load line is.
Coil is freezing over.
Return air is blocked, make sure debris is not blocking the
intake section.
Coil close-offs are not installed. Inspect coil to make sure
these parts are on the case.
Condensing coil or
evaporator coil is clogged
or dirty.
Clean coil.
Case temperature is
too cold.
The t-stat temp is set too
low.
Check settings. See
Technical Specifi cations section.
Ambient conditions may
be affecting the case
operation.
Check case position in store. Is the case located near an
open door, window, electric fan or air conditioning vent that
may cause air currents? Case must be located minimum
15 Ft away from doors or windows. Cases are designed to
operate at 55% Relative humidity and a temperature of 75°F.
Condensation on
glass.
Ambient conditions may
be affecting the case
operation.
Check case position in store. Is the case located near an
open door, window, electric fan or air conditioning vent that
may cause air currents? Case must be located minimum
15 Ft away from doors or windows. Cases are designed to
operate at 55% Relative humidity and a temperature of 75°F.
Inadequate air circulation.
Check if air sweep fans are functioning, check electrical
connections.
There is not enough heat
provided in the airfl ow.
Check if air sweep heater is functioning, check electrical
connections.
There are glass gaps on
the side of the case.
See glass adjustment section.
Glass is not completely
shut.
Close glass correctly.
