Page 8 • MN03010 ║ Issue/Rev. 0.4 (6/17)
Model 210 Valve (I / O / S) Manual
Troubleshooting Guide
3 – Troubleshooting Guide
Problem
Cause
Remedy
1.
Low or no flow.
A. No pump pressure
Start pump
B. Upstream block valve closed
Open valve
C. Improper wiring
Check wiring
D. Downstream Model 13 Valve on 210 Valve
closed
Open needle valve
E. AccuLoad or microLoad fuse blown
Replace fuse
F. Broken 210 Valve diaphragm
Check diaphragm
G.
Improper fluid connection to truck
Open dry break coupling
H. AccuLoad or microLoad relay failed
Test board*
I. Line strainer clogged
Visually check
J. Preset counter switch not working
Visually check
K. N.C. solenoid failed closed
Test and replace
2.
Improper or erratic high flow
A. Fluid pressure oscillating
Stabilize system
B. Improper pressure regulator pilot settings
Adjust settings
C. AccuLoad or microLoad Hi Flow setting
incorrect
Correct setting
D. Wiring connections loose
Repair as required
E. Solenoid wiring revised
Correct no. 3 & 4 connection
3.
Excessive high flow
A
Manual override valve open
Close valve
B. Improper wiring
Check wiring
C. N.O. solenoid failed to open
Test and replace
D. N.C. solenoid failed to close
Test and replace
E. Contamination in 210 pilot loop
Clean or replace
F.
AccuLoad or microLoad Hi Flow setting
incorrect
Correct setting
G. Pulse transmitter slotted disk loose on shaft
Reposition and tighten*
4. Valve shuts down early
A. Final zero adjustment too early
Read just "Zero" on Preset
B. N.O. solenoid leaking
Test and replace
C. AccuLoad or microLoad board defective
Test and replace
D. Leaking diaphragm
Replace diaphragm
5. Valve shuts down late
A. Upstream Model 13 needle valve
Open needle valve further
B.
Improper switch settings on high flow
Adjust preset counter trip+
C. First trip too late on Preset Counter
Adjust Preset Counter trip+
D. Final zero adjusting
Readjust "Zero" on Preset Counter
6. Valve fails to shut off
A. Manual override valve open
Close valve
B. Upstream Model 13 Needle Valve closed
Open needle valve
C. N.O. Solenoid failed to open
Test and replace
D. N.C. Solenoid failed to close
Test and replace
E. Final trip failed on Preset Counter
Replace or repair
F.
AccuLoad or microLoad board defective
Test and replace*
G. Valve strainer clogged
Check strainer
7. Line shock on shutdown
A. 210 Valve closing too fast
Gradually close upstream needle valve
8. Downstream system pressure too high
A. 210 Valve leaking
Repair as required
* See AccuLoad Installation Manual (Bulletin MN06135).
+ See Veeder-Root Installation/Operation/Service Manual 251278 (Bulletin 8-015).
