Troubleshooting 65
Cat. No. 01029401
General Troubleshooting
NOTE Error Codes can be found in the GBE Programming for Commercial Softeners and Filters manual
(01027295)
PROBLEM OR SYMPTOM CHECK PROCEDURE CAUSE
Slight Leak to Drain Disconnect pilot valve tubing at drain port
on the valve.
Flow from tubing indicates leaky seal
in pilot valve spool.
If pilot valve is not leaking, use a test kit
and check for hard water at the drain.
Possible missing or damage pis-
ton/cap O-Rings or T-Seal. If water
tests soft then fast rinse drain piston
is open. If the water tests hard then
backwash drain piston is open.
Leak at the Pilot Valve Check to see if the leak is at the top clamp,
valve manifold and/or outer spool body.
Pilot spool body o-rings are missing or
damaged.
Check to see if the leak is at the drain port
on the valve manifold.
Pilot spool o-rings damaged.
Check to see if the leak is at the pilot spool
shaft and/or inner pilot spool body
Pilot spool shaft o-rings damaged.
Leak around the Outside of the
Valve Core
Check drain holes (See Figure 79 on page
69)
See the Check Procedures and Caus-
es for “Leak at the Pilot Valve”.
Check the o-rings on the couplers of the
valve manifold
O-rings are missing or damaged.
Check Piston #7 vent port. (See Figure 78
on page 69)
No damage to valve. Expolusion of
water built up from factory testing.
High Flow to Drain During
Service
Check position dial pilot. If not in Position #1, manually cycle
the pilot drive assembly to Position #1.
If the flow stops, check the pilot drive
assembly.
Use a test kit and check the hardness of
the water at the drain.
Use a test kit and check the hardness
of the water at the drain. If soft then
fast rinse drain piston is open. If the
water tests hard then backwash drain
piston is open.
Check the feed water pressure Water pressure is less than 35 psi.
Piston Does Not Close or Open.
CAUTION: make certain that
the water pressure is relieved
from the system before remov-
ing the spool manifold.
Turn off the water pressure, remove spool
manifold, then remove piston from control
valve.
If there is no flow from the tubing, the
pilot strainer may be plugged.
• T-Seal may be dirty, worn or loose.
• Seat may be eroded.
• Upper piston o-ring may be torn.
Piston Does Not Open Turn off the water pressure, remove clamp,
remove external plumbing connections then
remove valve body from tank adapter. Visu-
ally inspect T-Seal.
T-Seal may be fouled or swollen.
Hard Water Leakage Into the
Service Lines.
CAUTION: make certain that
the water pressure is relieved
from the system before dissas-
sembling the control valve.
Inspect the bypass piston. If no flow from the tubing the pilot
strainer is probably plugged.
• T-Seal may be dirty, worn or loose.
• Seat may be eroded.
• Upper piston o-ring may be torn.
Build-up on the inside of the valve
cavity may be preventing the piston
assembly from seating.
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