Service Manual for Subway Front Counters
36
Check for visible frost on the unit and record fi ndings, yes or no in the boxes below.
There should be frost accumulating at the top of each of the rails, though it is not unusual for the frost to
be patchy.
From the information collected above here are some possible corrective action steps.
TRI CHANNEL STEP ONE TROUBLE SHOOTING GUIDE
Condition
Possible Cause
Corrective Action
All rail temperatures above 38°F.
High ambient temperature.
Improper air balance in the building.
Dirty condenser.
Correct restaurant environment,
clean condenser and possibly adjust
thermostat setting to cooler position.
One rail temperature signifi cantly
warmer than the others >6
°
F
(3.3
°
C). No frost accumulation
on one of the channels.
Poor liquid distribution.
Reposition drier assembly; assure
drier is at a 45% angle, and the 3 cap
tubes are parallel to the condensing
unit base.
