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TROUBLESHOOTING
When there is a problem with heat in a building, the first place people look is at the heating control. And the heating control may be
the problem, but so may be other system components, or perhaps the heating control is not adjusted properly. To help determine and
correct the problem, simply follow the troubleshooting guide that best describes your heating situation:
The troubleshoot diagrams in the following pages represent these issues:
•
N o Heat, No Pump
•
N o Heat, Pump Running
•
T oo Little Heat
•
T oo Much Heat
In addition to these basic problems, you may have intermittent problems. If you
S ometimes have No Heat, too Little Heat or too Much Heat, The HWRQ Platinum may not
•
be programmed correctly. Check through all the settings of the clock to make sure the Day and
Night Setback modes are when you want them to be. Go through all four settings for each day
of the week, making sure any unused settings display **:**. Pay special attention to the AM and
PM, since if these are incorrect, the program will be 12 hours off. Refer to Schedules/Day and
Night Schedule (menu selection)
H ave too Little Heat or too Much Heat Only at the #1 Day time, adjust your Vari Boost.
•
The Vari Boost changes with Outdoor temperature (OD), and is therefore recommended if there
is too little heat, increase the Boost Adjustment by 10°F, it there is too much heat, reduce the
Boost Adjustment by 10°F. Refer to System Settings/ System Settings 2/Boost Mode/Vari (menu
selection)
H ave too Little Heat Before the Last Setback Program, you may not wish to use the
•
Shutdown feature. Simply select the Vari Boost instead of Vari Boost+ESD. Refer to System
Settings/ System Settings 2/Boost Mode/Vari (menu selection)
•
H ave too Little Heat or too Little Heat Only in Parts of the Building, then check the heating
system components. Check that there is no air trapped in the system, and that the pump are
working properly.
TESTING THE SENSORS
The HWRQ Platinum sensors record the temperature where they are located. Before assuming a
sensor is not working, it is important to get an accurate reading at the sensor location. If the outdoor
sensor is affected by sun, exhaust fans, open doors, or windows, the reading may vary significantly
from the actual outdoor temperature. Similarly, if the heating system sensor (HSS) does not appear to
be reading correctly, check if it is located correctly.
To perform the test, you will need a digital multi-meter capable of reading resistances. The Heating
System Sensor and Outdoor Sensor temperatures are constantly displayed on the HWRQ Platinum.
Remove the outdoor sensor wires from the Out Temp terminals (A11 and A12), or the heating system
sensor wires from System Temp terminals (A1 and A2). Use the multi-meter to take a resistance
reading across the detached wires going to the sensor. If the reading shows:
•
O PEN or resistance is higher than the values on the adjacent chart - Check the wires going to
the sensor. They may have been broken or become disconnected. If the wires are fine, check
the resistance at the sensor itself. If the resistance is still open, the sensor has been damaged and
needs to be replaced.
•
S HORT or resistance is lower than the values on the adjacent chart - Check the wires going to
the sensor. They may have become shorted together in the run of the wire. If not, check the
resistance at the sensor itself. If there still is no resistance, the sensor has been damaged and
needs to be replaced.
•
R esistances from 187 ohms to 117720 ohms - Find the temperature that corresponds to the
resistance value on the chart. If the sensor appears to be outputting correctly, check that the
wires were properly connected to the HWRQ Platinum inputs. If the sensor is not outputting
correctly, take another reading at the sensor itself. If this is correct, the problem is in the wiring
between the sensor and the HWRQ Platinum. Otherwise, the sensor has been damaged, and
should be replaced.
46
HWRQ Platinum Installation and Operation Manual
Temperature Sensor Chart
TEMPERATURE
Value
(in
°F
°C
Ohms)
OPEN
150000
-30
-34
117720
-20
-29
82823
-10
-23
59076
0
-18
42683
10
-12
31215
20
-7
23089
25
-4
19939
30
-1
17264
35
2
14985
40
4
13040
45
7
11374
50
10
9944
55
13
8714
60
16
7653
70
21
5941
80
27
4649
90
32
3667
100
38
2914
110
43
2332
120
49
1879
130
54
1524
140
60
1243
150
66
1021
160
71
842
170
77
699
180
82
583
190
88
489
200
93
412
210
99
349
220
104
297
230
110
253
240
116
217
250
121
187
SHORT
100
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