14
Troubleshooting
No Display or LED Lights
Check the power to the VSP
Elite
. The VSP
Elite
requires 120VAC power to the Black wires. Turn the power off and back on to
restore the display. If unsuccessful, make sure the Display Cover of the control is securely mounted to the Base.
System or Outdoor Reads OPEN or SHORT
If Open, short the sensor input terminals. The display should read
SHORT
. If it doesn’t, the VSP
Elite
may be damaged.
If Short, remove the wires from the input terminals. The display should read OPEN. If it doesn’t, the VSP
Elite
may be damaged.
System or Outdoor Reads an Incorrect Temperature
Remove the wires from the input terminals. The display should change to read
OPEN
. If it doesn’t, the VSP
Elite
may be damaged.
Take an ohm reading across the detached sensor wires. The ohm reading should correspond to the Temperature Sensor Chart. If the
difference is within 5°F adjust the Trim for the sensor Otherwise, the sensor may be damaged.
No Heat - All LEDs are OFF
Check the outdoor temperature and Outdoor Cutoff readings. If the outdoor temperature is above the Outdoor Cutoff, the VSP
Elite
will not give heat. If the display shows
TSTAT OPEN
then, check the
EXT±
terminals. If the
EXT±
terminals are not jumped
together, the VSP
Elite
will not give heat. See Enable/Disable Inputs on page
13. Finally, if the display shows
MANUAL OFF
then, the Pump Mode has been set to Manual with a speed of 0%. Change Pump Mode to
AUTO
. See Pump Mode on page 13.
No Heat - System Pump LED ON - Pump Not Running
Remove any connections to the Yellow wires for the Heating System Pump. Test for continuity across the pair of Yellow wires. If
the wires are continuous, the VSP
Elite
is calling for the Secondary Loop/System Pump to run and the problem is not with the VSP
Elite
. Check the power source and the pump to determine why it is not circulating.
No Heat - System Pump LED ON - Pump Running
Check that the boiler (or other hot water source) is providing hot water to the Boiler Loop and no valve obstruction between the
Boiler Loop and the Injection Loop. Check that the Injection Pump is running by measuring the pipe temperatures on the Injection
Loop and the Secondary Loop. Check the Minimum Speed Adjustment. If the Minimum Speed Adjustment is set too low, the pump
motor might not have the torque to maintain its operation. See Minimum Speed Adjustment on page 13.
Too Little Heat
First check that the Outdoor sensor reads a temperature not Short
or Open. If it does and Sensor Fault has been set to Output Off, the
VSP
Elite
will try to maintain the Minimum Target temperature.
Follow the System or Outdoor Reads Open or Short section. Repair
or replace the faulty sensor. Otherwise, if all sensor readings
are accurate, check if the Target temperature is the same as the
Maximum Target. If so, check the Maximum Target has not been
set too low for the system (DO NOT increase the Maximum Target
without consulting the installer or tubing/flooring manufacturer).
Finally, adjust the Reset Ratio or Offset to increase the temperature
of the circulating hot water. Note that, depending on the type of
radiation, it may take several hours before the ambient temperature
increases.
Too Much Heat
Check if the Outdoor or System temperature is not reading
Short
or
Open
. Follow the System or Outdoor Reads Open or Short
section. If Sensor Fault was set to
Output ON
, the VSP
Elite
will provide excess heat to the building injection zone. Repair
or replace the faulty sensor. Otherwise, if all sensor readings
are accurate, adjust the Reset Ratio or Offset to decrease the
temperature of the circulating hot water.
Temperature Sensor Chart
TEMPERATURE
(in Degrees
°
F)
Value
(in Ohms)
-30
117720
-20
82823
-10
59076
0
42683
10
31215
20
23089
25
19939
30
17264
35
14985
40
13040
45
11374
50
9944
55
8714
60
7653
70
5941
80
4649
90
3667
TEMPERATURE
(in Degrees
°
F)
Value
(in Ohms)
100
2914
110
2332
120
1879
130
1524
140
1243
150
1021
160
842
170
699
180
583
190
489
200
412
210
349
220
297
230
253
240
217
250
187
