heat-timer Mini-MOD-CNC Installation And Operation Manual page 47

21
TROUBLESHOOTING
SENSOR INPUTS
DISPLAY SHOWS SENSOR OPEN OR SHORT
When OPEN, Check the sensor is connected and the wires are continuous to the Mini-MOD-CNC. Finally follow the procedure for
Incorrect Temperature Display. When SHORT Remove the wires from the sensor terminals. The display should change to read OPEN.
If it does not, the Mini-MOD-CNC may be damaged. When OPEN short the wires from the sensor terminals. The display should
change to read SHORT. If it does not, the Mini-MOD-CNC may be damaged.
DISPLAY SHOWS AN INCORRECT TEMPERATURE
Remove the wires from the sensor terminals. The display should change to read OPEN. If it does not, the Mini-MOD-CNC may be
damaged. Take an ohm reading across the detached sensor wires. The ohm reading should correspond to the Temperature sensor
Chart. If it does not, the sensor may be damaged.
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059102-00 REV. C HEAT-TIMER CORP. 47