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OPERATIONAL SYMPTOM POTENTIAL CAUSE/REMEDY
1.Unit fails to start. a. Unit unplugged, breaker tripped or fuse blown.
b. Switch in OFF position.
2. Interior compartment is too warm. a. Door(s) open.
b. Warm product recently loaded.
c. Door gaskets damaged or worn.
d. Pan(s) missing.
3. Condensation on the exterior surface. a. Condensation on the exterior surface of the
unit is perfectly normal during periods of
high humidity.
b. Door(s) misaligned or gaskets faulty.
4. Product temperature in rail too warm. a. Product held in plastic pans.
b. Room ambient temperature exceeds 86°F.
Operate in room ambient below this temperature.
c. Air drafts disrupting air-flow over product pans.
d. Food debris blocking air discharge and/or return
vents.
e. Product loaded in pans above 36°F.
f. Rail inserts missing.
g. Base doors left open.
h. Pan(s) missing.
VIII. TROUBLE SHOOTING GUIDE
• Keep the condenser clean. Don’t obstruct the airflow.
• Reset the defrost timer to the proper time of day upon startup after any power loss or
shutdown.
• Rail inserts must be in place (under pans) before loading any pans.
• Use only 4” deep stainless steel or aluminum pans.
• All pan spaces should be filled any time the unit is running, even if some pans are empty.
• Keep the room temperature at 86°F (30°C) or less.
• Do not allow air drafts (such as heat, A/C or ventilation) to blow on or over the rail area.
This will disrupt the air blanket over the product area, resulting in poor holding
temperatures.
• Rail covers should be closed over the rail as much as possible.
• Product should be loaded into the rail at a maximum temperature of 36°F. The VPS unit
was not designed to chill warm product, but to hold refrigerated product at a safe
temperature.
• Keep the area around the evaporator fans clear.
• When cleaning the rail area, do not wipe debris into the raised openings in the rail
bottom. These are air discharge and air returns for the VPS system, and must be kept
clean, clear and open.
IX. OPERATIONAL GUIDELINES
Follow these simple guidelines for proper VPS operation:
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