Operating instructions

DELUXE FOOD WARMER

P/N 1010678 Rev. G 08/08

OPERATION (continued)

Hi-Limit Reset Button

A hi-limit thermostat will turn off electrical power to the

heater if the unit overheats. To reset this thermostat,

allow sufficient time (about 45 minutes) for the unit to

cool down, remove the Cap located on the rear of the

unit (Figure 8) and then fully press the Reset Button .

If the unit requires continuous resetting, contact your

Roundup authorized service agency.

Figure 8. Hi-Limit Reset Button

Reset Button

Cap

Diagnostic LEDs (Timer Models) Only

This control board has 4 diagnostic LEDs described

below.

Green (Program): When lit, indicates the unit is in

Program mode.

Yellow (Audio): When lit, indicates 10-15 VDC is

being supplied to the audio signal. The audio signal

will sound and the LED will be lit for approximately 3

seconds.

Red (Heat): When lit, indicates the unit is calling for

heat by supplying 10-15 VDC to the solid state relay.

When off, indicates the generator surface is up to

temperature.

Green (H2O): When lit, indicates that 24 VAC is being

supplied to operate the solenoid valve used in DFW/

DFWT/DFWF-250 units or to the water pump used in

the DFW/DFWT-150 units.

NOTE: This LED is only lit for approximately

1 second.

Diagnostic LEDs (Non-Timer Models) Only

This control board has 2 diagnostic LEDs described

below.

Yellow (CR2): If lit, indicates the thermistor probe is

disconnected or open. The thermistor should be 100k

ohms +/- 2% at room temperature.

NOTE: The unit will not call for heat. This LED

should NOT be lit during normal operation.

Red (CR4): When lit, indicates that the unit is calling

for heat by supplying 15-20 VDC to the solid state relay.

When off, indicates that the Generator surface is up to

temperature.