14
RTHC-SVN02C-EN
Figure 7
Pressure Transducer Graph
0
20
40
60
80
100
120
140
7.1
7.84
8.65
9.35
9.66
10.9
11.48
12.3
6
13.06
mA
Pr
essur
e
Table 3
Troubleshooting Table
Problem
Possible Causes
Water valve won’t modulate
•
mechanical failure of valve
•
failure of valve actuator
•
incorrect signal sent by 4U1 (ASM) module
•
failure of one or both of the pressure transducers
•
incorrect power supply
•
loose connections
Valve opening unstable
•
noise on signal line
•
potentiometer loose on 4U1 module (tighten set screws)
•
system water pressure incorrect
•
factory settings on valve actuator need to be adjusted
Valve opening does not match
input signal
•
incorrect signal
•
improper adjustment to the Zero/Span settings on the valve actuator
•
loose connections
