• Air flow blocked by product in
front of evaporator or air duct
openings.
E. Shortage of refrigerant or
restriction
F. Check target temperature
setting.
REFRIGERATED SPACE TOO COLD
• Target temperature set too cold.
REFRIGERATED SPACE TOO WARM
A. Target temperature set too warm.
B. Restricted evaporator space.
• Evaporator motor or blades
faulty, causing the coils to ice
over the evaporator.
• Condenser airflow restricted.
➢
Plugged or dirty condenser.
➢
Condenser motor or blades
bad.
➢
Blade stuck.
• Condensing space restricted.
➢
Unit placed too close to a
wall.
• Compressor - bad valves.
➢
Cap tube will start frosting
8 to 10 inches past
evaporator connection
tube.
➢
Check for oil around
brazed connections.
• Leak around delivery door
gasket.
TROUBLESHOOTING CIRCUITS WITH MULTI-METER
A. Check the power source. Use
voltage section of the Multi-
Meter. Should measure within
5-10% above, 5% below.
B. Check overload.
Using the resistance section of
the Multi-Meter, check terminals 1
and 3 for continuity. If no continuity
is measured(infinity), overload may
be tripped. Wait10 minutes and try
again. If still no continuity, overload
is defective.
C. Check relay. See Figure 12
shown below. Unscrew lead
terminals and remove relay from
compressor. Keep relay upright.
D. Check terminals 1 and S, or L
and S with the Multi-Meter.
Replace relay if continuity exists.
E. Check compressor windings.
See Figure 12 shown below.
F. Check winding resistance with
the Multi- Meter. If readings are
not within 2 Ohms, the
compressor is faulty
WARNING: Wiring diagram must be followed as shown. Wrong
wiring can cause serious electrical hazard and potential damage or
rupture component electrical parts.
NOTE: Power
must be off and
fan circuit open.
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