Instructions / Assembly

88
SENSAPHONE 1800 User’s Manual
TEMPERATURE MONITORING:
PROBLEM 1
Can’t program temperature limits; or the unit won’t read the temperature
sensor.
The zone isn’t configured to read a temperature sensor.
Press SET and CONFIGURE to program the zone. For 10K thermistor, you
must manually configure. See Chapter 4.
PROBLEM 2
The temperature reading is -121° F or -85° C [2.8K]; or -87° F or -85° C
[10K].
The temperature sensor has been disconnected or has broken wires.
Examine the wires to temperature sensor and connect or replace wiring.
PROBLEM 3
The temperature reading is 115° F or 57° C [2.8K]; or 168° F or 76° C [10K].
Temperature sensor wires are touching or have shorted.
Verify and correct wiring.
PROBLEM 4
Temperature reading is inaccurate.
a) The zone is configured for the wrong type of thermistor (i.e., 2.8k vs.
10k): Manually configure the zone as described in Chapter 4.
b) Temperature sensing may be affected by a source of ambient heat
(ie., direct sunlight, or heat duct proximity): Try moving the sensor to a
different location.
c) Temperature may require calibration: After moving or placing the
sensor away from ambient heat sources, the temperature may be calibrated
to offset inaccurate normal reading by several degrees. Refer to Chapter 4.
d) The unit is using the wrong temperature scale (Fahrenheit vs. Celsius):
Verify temperature scale. Refer to Chapter 4.
4–20MA MONITORING:
PROBLEM 1
Can’t program 4–20mA range; or the unit won’t read the 4–20mA sensor.
The zone isn’t configured to read a 4–20mA sensor.
Press SET and CONFIGURE to program the zone. See Chapter 4 for infor-
mation on zone configuration.