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Problem
Case temperature is
too warm.
Case temperature is
too cold.
Condensation on
glass.
12. Troubleshooting Guide
Possible Cause
Ambient conditions may
be affecting the case
operation.
Discharge air temp is out
of spec.
Case is in defrost.
Product load may be over
its limits blocking airflow.
Coil is freezing over.
Condensing coil or
evaporator coil is clogged
or dirty.
The t-stat temp is set too
low.
Ambient conditions may
be affecting the case
operation.
Ambient conditions may
be affecting the case
operation.
Inadequate air circulation.
There is not enough heat
provided in the airflow.
There are glass gaps on
the side of the case.
Glass is not completely
shut.
Possible Solution
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.
Check evaporator fan operation. Check electrical connections
and input voltage.
Fans are installed backwards. Check airflow direction.
Fan blades are installed incorrectly. Make sure fan blades
have correct pitch and are per specification.
Check to see that fan plenum is installed correctly. It should
not have any gaps.
Check suction pressure and insure that it meets factory
specifications.
Check defrost settings. See Technical Specifications section.
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.
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.
Clean coil.
Check settings. See Technical Specifications section.
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.
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.
Check if air sweep fans are functioning, check electrical
connections.
Check if air sweep heater is functioning, check electrical
connections.
See glass adjustment section.
Close glass correctly.
50
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