Install Instructions
14
TROUBLESHOOTING TIPS
1. If the setup check is okay, a problem may be due to a faulty
sensor, faulty installation, or faulty wiring.
2. Disconnect the sensor wires from the DPM-2 terminals and
measure the resistance between the wires. The measured
resistance should be within 5% of the values in the table below.
If the meter indicates an open or short you might suspect the
wiring between the sensor and the DPM-2.
3. If the outdoor sensor disagrees with another outdoor
thermometer, it may be located in direct sunlight. Reposition
the sensor if necessary.
DO NOT PROCEED UNTIL BOTH
SENSORS ARE PERFORMING PROPERLY.
RTD SENSOR TROUBLESHOOTING
To conrm that the RTD Sensor is functioning properly:
Remove both RTD leads from the terminal block on the control 1.
board.
Use a multimeter to take an ohm reading across the RTD leads.
2.
A properly functioning RTD Sensor will produce a reading of
approximately 1005 ohms at 70°F while a faulty RTD will read
either “0” or “1.”
Replace RTD if necessary.
3.
X - TROUBLESHOOTING
(Example following page)