Roubleshooting - heat-timer Multi-MOD Platinum Installation And Operation Manual

TROuBleSHOOTING
No Display, or Garbled Display
• Check the 120VAC power input to the control . Turn power to the control off and back on .
• Make sure that the Green Ground Screw is connected to a reliable Earth Ground .
• Make sure that all wiring is fed to the control through the bottom knockouts and that no voltage wiring is
running behind the control board .
SeNSOR INPuTS
Display shows Sensor OPeN or SHORT
• If the sensor reads Open, short the sensor input terminals . The display should read
then the problem is with the sensor wiring . If it doesn't, then the control may be damaged .
• If the sensor reads Short, remove the wires from the input terminals . The display should read
does, then the problem is with the sensor wiring . If it doesn't, the control may be damaged .
System or Outdoor Reads an Incorrect Temperature
• Remove the wires from the input terminals . The display should change to read
Multi-MOD Platinum may be damaged .
• Otherwise, take an ohm reading across the detached sensor wires . The reading should correspond to
the Temperature Sensor Chart . If the difference is within 5°F adjust the sensor trim . See "System and
Outdoor Sensor Trim" on page 47 . Otherwise, the sensor may be damaged .
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
Display shows an Incorrect Pressure
• Check the pressure range set in the System Startup . If the reading is still not correct remove the wires
from input terminals S and + (A5 & A6) . Check for DC voltage across the two terminals . If voltage
between 5 and 36 is not present, the control may be damaged .
• Connect the black sensor wire to terminal + (A6) . Put an amp meter in series by connecting the meter's
(-) to the sensor's detached red wire, and connect the meter's (+) side to the S (A5) input terminal . The
mA reading should correspond to the Pressure Sensor Chart . If it doesn't, the sensor may be damaged .
Pressure Sensor Chart
INPuT 0-30 0-100
(in mA) Range Range
(in PSI) (in PSI)
2
4 0 0
7 .2 6 20
10 .4 12 40
Multi-MOD Platinum with Space and Scheduling Installation and Operation Manual
TeMPeRATuRe
°F °C
30 -1
35 2
40 4
45 7
50 10
55 13
60 16
70 21
80 27
0-200 0-300
Range Range
(in PSI) (in PSI)
Open
0 0
40 60
80 120
Value TeMPeRATuRe
(in
°F °C
Ohms)
17264 90 32
14985 100 38
13040 110 43
11374 120 49
9944 130 54
8714 140 60
7653 150 66
5941 160 71
4649 170 77
INPuT 0-30
(in mA) Range
(in PSI)
13 .6 18
16 .8 24
20 30
22
. If it does,
Short
. If it doesn't, the
Open
Value TeMPeRATuRe
(in
°F °C
Ohms)
180 82
3667
190 88
2914
200 93
2332
1879 210 99
1524 220 104
1243 230 110
1021 240 116
250 121
842
SHORT
699
0-100 0-200 0-300
Range Range Range
(in PSI) (in PSI) (in PSI)
60 120 180
80 160 240
100 100 300
Short
. If it
Open
Value
(in
Ohms)
583
489
412
349
297
253
217
187
100
49