Troubleshooting - Hussmann DC-1 Series Installation Manual

PRODUCT INSTALLATION MANUAL

Troubleshooting

ISSUE
Product temperature is higher
than requirement.
ISSUE
Products are freezing up.
ISSUE
Cabinet exterior is sweating.
ISSUE
LED are not working.
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POSSIBLE REASON
Store condition is warmer or more humid
than climate class 3 (25°C/60%RH).
Refrigeration plant is not running or
operating at inappropriate settings or
conditions.
Evaporator pressure is not set correctly.
Insufficient or no air flow appears at the
case air outlet.
Case shelf arrangement has been deviated
significantly from original specified setup.
Air Return is blocked by merchandise.
None of above.
POSSIBLE REASON
Store condition is too cold compared to
design climate class 3.
Case evaporator pressure is
lower than specification.
POSSIBLE REASON
Store humidity is high.
Insufficient ventilation.
Icon Controller settings (if fitted).
Case SST.
POSSIBLE REASON
No power supply.
LED fittings.
LED failed.
Table (1) General Troubleshooting
REMEDIAL ACTIONS
Check store air conditioner operation.
Check for compressor rack if it is running.
If rack is running and other possible
reasons are eliminated then call
refrigeration mechanic to check plant
operation.
Check suction pressure settings at the case
and if required adjust as per
case specification.
Check if case fans are turned on or
operating correctly. If any doubt of fan
operation contact technician.
Check if coil is frozen up. If frozen then
check defrost settings as per the
manufacturers guideline or set to suite
the store operating condition. A colder store
may require longer defrost
duration. A humid store may need
more frequent defrost.
Re-do the shelf arrangement as per
the original specification.
Remove merchandise to behind
the load limit.
Contact Hussmann.
REMEDIAL ACTIONS
Check store air conditioner operation. If
store condition can not be lifted, then adjust
cabinet evaporator pressure and defrost
strategy to suite.
Adjust cabinet evaporator pressure
to suite.
REMEDIAL ACTIONS
Check store air conditioner operation.
Check case ventilation under and at rear
of the case.
Check settings.
SST set too low.
REMEDIAL ACTIONS
Check supply is "on" and light
switch is working.
Call technician to check and.
replace in necessary.
Replace LED.
DC13 COLD PLATE
Hussmann