Trouble Shooting Two, Diagnostic LED, Problem

Trouble Shooting Two

PROBLEM	POSSIBLE CAUSE	CORRECTION
Moisture collects on	Hot and humid conditions.	Extremely hot and humid conditions can cause
outside surface of cabinet.		condensation on the outside of unit. As
		humidity and/or temperature decreases,
		condensation will disappear.
Moisture collects on inside	Too many door openings.	Limit the amount of door openings.
of the unit.	Prolonged door openings.	Limit the amount of time with the door open.
	Hot and humid conditions.	Extreme hot and humid conditions. Move unit
		to a controlled environment. May consider
		having the defrost section changed from 12 to
		6 hours.
	Defrost thermistor out of specification.	Consult dealer or servicer for diagnosis.
The unit is too warm or too	Adjustment of the temperature control	Adjust the temperature control to warmer or
cold.	knob.	colder setting and allow 24 hours before
		readjusting if necessary.
	Temperature control slide in the	Adjust temperature control slide as necessary
	refrigerator section too far open.	in the refrigerator section of the unit.
The unit is warm inside	Drip tray heater is on.	The drip tray heater will remain energized with
with the temperature		the control knob in the off position. Unplug the
control know in the “OFF”		unit if storing or leaving the unit off for
position.		extended periods of time.
Items on door shelf	The upper two shelves of the door can	Turn the temperature control knob to a lower
sometimes freeze.	freeze under warm conditions.	number or move the commodities to the
		refrigerator section.

In the back in the grille there is a diagnostic/status LED. This led is used to help diagnosis any problems with the unit and to tell its status.

LED status	Code/Problem
Not on or blinking	Unit does not have power
steadily blinking once per second	Unit temperature control is in the "OFF" position
Continuously on	Unit is "ON" and operating correctly
2 blinks and pause; repeated pattern	Defrost thermistor out of range
3 blinks and pause; repeated pattern	Evaporator normal cycling thermistor out of range
4 blinks and pause; repeated pattern	Control potentiometer out of range
2 blinks, pause, 3 blinks, pause; repeated pattern	Both defrost and evaporator thermistor are out of range