Service Manual

11
1. Factory Default Setting:
a) Temperature Settings: 32°F.
b) Temperature Display Scale: °F.
For further details, see "II.C.Controller Check" or "III.Controller and Adjustments."
Note:
• When exposed to high temperatures, a high-temperature alarm "Hi" may
occur at startup. To silence the alarm, press and release the “SET” button.
Alarm automatically resets when temperature drops to an acceptable range.
• There is a minimum 3-min. Comp on time and 3-min. Comp off time.
1) Move the power switch to the "OFF" position.
2) Unplug the appliance from the electrical outlet.
3) Remove the control box cover.
4) Plug the appliance back into the electrical outlet.
5) Move the power switch to the "ON" position.
6) Confirm 115VAC at the power switch in the top terminal (Brown) and neutral (White),
also confirm proper supply voltage at the receptacle box.
7) Startup/Cool Down - EvapFM energize. There is a slight delay of 3-min. then Comp
and ConFM energize. Cabinet temperature appears in the Display.
a) EvapFM Diagnosis: Confirm EvapFM energizes. If not, check for 115VAC at
EvapFM terminal connection in Brown and White wire. If 115VAC is not present,
check continuity between the Brown wire at power switch at the “ON” position and
Brown wire at EvapFM terminal. If there is no continuity, replace the main wiring.
If continuity does exist between the Brown wire in the power switch and the Brown
wire at the EvapFM terminal, check that Evap FM is energized and fan blades turn
freely, if not, check fan blades for binding and FM winding continuity. Replace as
needed.
b) Controller Diagnosis: Cabinet temperature appears on Display. If not, check for
115VAC at the controller terminals #6 (Brown) and #7 (White). If 115VAC is not
present, check power switch, power cord connections, and breaker/fuse. Confirm
wiring connections are secure. If 115VAC is present and the Display is off, replace
the controller.