P/N 1011306 Rev. D 12/17
7
Display Codes
This section describes the different display codes and their
meanings.
TEMP
UP
TEMP
DOWN
TEMP
SCALE
F
C
O
O
“LO” flashes during the initial warm up period. The unit continues
to display this code until the unit reaches the setpoint tempera-
ture. When the unit reaches the setpoint temperature, it displays
the setpoint temperature.
This figure shows an example setpoint temperature of 150° F
displayed on the console.
“HI” flashes if the actual cabinet temperature exceeds the setpoint
temperature or if the thermistor has shorted.
NOTE:
The thermistor should be 100k ohm +/- 2% at room
temperature.
“OPEN” flashes if the thermistor is OPEN or disconnected. The unit
will not call for heat.
NOTE:
The thermistor should be 100k ohms +/- 2% at room
temperature.
“PO” In 120 VAC units, this code flashes if the supply voltage is
below 100 VAC or above 135 VAC. In 220/240 VAC units, this code
flashes if the supply voltage is below 190 VAC or above 265 VAC.
NOTE:
If voltage is within normal ranges, then the
Control Board is faulty.
To reset a unit in this state, the supply voltage must be within ac-
ceptable limits and the unit must be turned off for a few seconds
and then turned back on.
Summary of Contents for DCH-1000
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