SM/SV-Space Master Unit Coolers (E316008_B)
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the same location as the original heater. Install new heater rod in the coil original coil slot, rotate the rod 90°,
and replace the wires in the positions of the original wires in the terminal block.
Turn off all electrical power on the unit.
Drain pan heaters require the drain pan to be removed. Support the long dimension of the pan from underneath
with a minimum of two 4x4s for one and two fan units or two 6x6s for three and four fan units so the outer sheet
metal skin does not buckle and become damaged. For longer pans more than one lifting device may be needed to
keep the pan balanced when lifting. Remove heater’s wires from terminal blocks. Remove the drain line so that
it is out of the way of the pan when it is being lowered. Remove the drain pan attachment bolts from the bottom
of the evaporator unit and slowly lower the pan from the unit. Remove clips from the heater’s hold down
brackets and remove brackets. Replace the heater. Replace the hold down brackets and assemble the pan in
reverse order. Rewire heaters in original terminal blocks.
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TROUBLESHOOTING CHART
Table 9 TROUBLESHOOTING CHART
PROBLEM
POSSIBLE CAUSES
CORRECTIVE ACTION
Fans will not operate.
Unit not wired properly.
Defective motor.
Defective defrost timer,
termination thermostat or fan
delay switch.
Room temperature too high for
use of fan delay switch.
Check wiring.
Replace motor.
Replace defective component.
Jumper fan delay switch.
Terminals F to B.
Ice forming on ceiling.
Steaming during defrost.
Too many defrosts per day.
Too long defrost cycle.
Defective termination
Thermostat or defrost timer.
Observe frost build up on coil,
change to fewer defrost per day.
Replace defective component.
Excessive buildup of
frost on coil.
Too few defrost times.
Defrost cycle too short.
Too high humidity in cooler.
Add more defrost cycles to timer.
Extend defrost time on timer.
Limit access to cooler, do not prop
doors open during stocking.
Accumulation of ice in
drain pan.
Drain line plugged.
Defective heater.
Clean drain line. Make sure drain
line is insulated properly.
Replace heater.
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REPLACEMENT PARTS LIST
Listed below are the major replacement parts. When ordering parts it is imperative that you provide the
complete model and serial number of the unit to the Parts Department.
