Installation & Service Manual
N5D, N5DH, N5DL, N5DSC
May, 2004
Page 17
SERVICE INSTRUCTIONS
Troubleshooting Self-Contained Units
WARNING
Never work on electrically powered equipment while it is energized! Electrical shock could
cause personal injury and/or death.
TROUBLE
COMMON CAUSE
REMEDY
1. Unit will not run
Blown fuse
Replace fuse.
Low voltage
Check outlet with voltmeter. Voltage
should be 115V or 220V (±10%).
Inoperative motor or
Check connections.
temperature control
2. Refrigerated section
Shelves overloaded;
Make sure items do not block the
is too warm
blocked air flow
air flow.
Thermostat set incorrectly
Check setting.
Pressure control set
Check setting.
incorrectly
Case fans not operating
Check terminal block connections.
3. Refrigerated section
Thermostat set incorrectly
Check setting.
too cold
Pressure control set
Check setting.
incorrectly
4. Unit runs all the time
Inadequate air circulation
Relocate cabinet or remove obstruc-
tion. Check installation requirements.
Room temperature
Ventilate room appropriately.
too warm
Thermostat set incorrectly
Reset thermostat.
Refrigerant charge low
Have unit serviced by a qualified
service technician.
5. Noisy operation
Loose baffles
Tighten or brace baffles.
Tubing contacting cabinet
Move tubing.
or other tubing
Cabinet not level
Level cabinet.
6. Frost or ice on
Defrost clock doesn’t work Check electrical conections. Have
evaporator coil
unit serviced by a qualified service
technician.
7. Water dripping from
Condensate drain clogged
Clear drain.
case drain
Dissipator not functioning
Check electrical supply. Check
float assembly.
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Summary of Contents for Advantage Series
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