46
Condition
Troubleshooting
Case Lights are not
working
Check that Light switch is in the ON position
Check for burned out bulbs. Turn lights off & replace.
Clean dirt and dust from the bulbs to prevent fl ickering.
Check to insure voltage at LED Driver. If voltage is entering but not exiting the LED
Driver, LED Driver is faulty.
Check that ALL lights are plugged in and receptacles capped.
Control Display is
Flashing
Check Temperature Controller section in this manual.
Considering Unit is not
Operating (Self-Contained
units only)
Check Temperature Controller section in this manual.
Check that the power is turned on.
Review Temperature Controller's Settings for accuracy
18. Troubleshooting Condensing System
Troubleshooting Condensing System (Qualifi ed Service Technicians Only)
Condition
Troubleshooting
Head Pressure too High
Check that the Condensing Coil is not dirty or covered.
Check the Condensing Fans are working.
Check that the refrigeration system is not overcharged.
Check that case is free of non-condensables.
Check that the Liquid Line Drier Filter is not plugged.
Check Set Point temperature; it may be adjusted to high.
Check System Operating temperatures.
Check that Store Ambient temperature isn't above maximum allowed. See Overview
and Warnings Section.
Head Pressure too low
Check that Refrigerant Charge isn't too low.
Check that Suction Pressure isn't too low.
Check to verify that Compressor Valves aren't faulty.
Troubleshooting General Issues (Cont'd)
