Troubleshoot - heat-timer DiGi-SPAN Elite Series Installation And Operation Instructions Manual

• I n cooling applications, the TSC Elite control will use the Set Point plus the Differential as a starting
point when sensor reading is increasing. It will energize the output relay as long as the sensor is
above the Set Point (Target).
• W hen the system value falls in cooling applications, the relay will remain energized until the Set
Point (Target) is reached. Then, it will de-energize.
• T he Change-Over option will allow Output 1 relay to follow SP1. Output1 relay will energize
whenever the sensor valve is above SP1 plus the differential. The relay will de-energize when
the sensor value drops to the SP1 value. The Output 2 relay will follow SP2. Output2 relay will
energize whenever the sensor valve is below SP2 minus the differential. The relay will de-energize
when the sensor value increases to the SP2 value.
Output Light
The TSC Elite has three lights, however, only the left two output
lights are used. They follow the relay operation. Whenever,
the left Output Light is ON, Output 1 is active and the relay is
energized. The middle light will represent Output 2 status.
Enable/Disable Input
The TSC Elite will operate in heating or cooling modes only if the EXT- and EXT+ terminals
are shorted. If no external equipment or switch is connected to these terminals, leave the factory
installed jumper. When the terminals are OPEN, the Target will display TSTAT OPEN.
On a sensor fault while the Enable/Disable terminals are open, the
control will follow the Enable /Disable state. However, the System
Sensor will display the fault condition weather Short or Open.

Troubleshoot

No Display:
T urn the power off and back on. Make sure the Display section
is mounted securely to the base.
OPEN or SHORT Display:
F irst, make sure that the Sensor Type selected matches the
sensor used. Also, make sure that the sensor is connected to
the respective input terminals. If control reads OPEN, the
TSC-Elite either does not see a sensor connected or the sensor
reading is below the sensor operating range. Check the sensor
wires are connected from the sensor to the TSC-Elite controller.
If SHORT, the TSC-Elite either sees a short across the input
terminals or the sensor reading is above its operating range.
Remove the sensor wires from the TSC-Elite terminals, the
display should read OPEN. If the display does not change to
OPEN, the TSC-Elite may be damaged. Otherwise, follow steps
for Incorrect Temperature Display for temperature sensors or
Incorrect pressure or Vacuum Display for all transducers.
Incorrect Temperature Display:
R emove the wires from the SENSOR screws. The display
should change to read OPEN. If it doesn't, the TSC-Elite may
be damaged. For temperature, take an ohm reading across the
detached sensor wires. The ohm reading should correspond
to the chart on the right. If the ohm reading is significantly
different, the sensor may be damaged.
ALERT
TSC Independent
Cooling
TSC Digi-Elite Operation Manual
7
®
SYSTEM =
o
TARGET = 125 F/150
OUTPUT1 OUTPUT2
Decrease Increase
SET
250°F/120°C Temperature
Sensor Chart
TEMPERATURE
(in Ohms)
°F °C
OPEN
-30 -34
-20 -29
-10 -23
0 -18
10 -12
20 -7
25 -4
30 -1
35 2
40 4
45 7
50 10
55 13
60 16
70 21
80 27
90 32
TSC Consecutive
SP1
SP2
DIF
65
Diff
60
Dead
Band
Off
50
45
o
117 F
o
F
System
TSC Change-Over
Heating/Cooling
SYSTEM=
TSTAT OPEN
SYSTEM=
TSTAT OPEN
Value
TEMPERATURE
°F °C
150000
117720 100 38
82823 110 43
120 49
59076
42683 130 54
31215 140 60
150 66
23089
19939 160 71
17264 170 77
180 82
14985
13040 190 88
11374 200 93
210 99
9944
8714 220 104
7653 230 110
240 116
5941
4649 250 121
3667 SHORT
Cooling
= 60
= 50
= 5
SP1
Off
SP2
Diff
55 F
SHORT
Value
(in Ohms)
2914
2332
1879
1524
1243
1021
842
699
583
489
412
349
297
253
217
187
100