Troubleshooting - Hydro Systems Twist II Clean Mode D'emploi

New Install - Always Pressure Up Slowly (Follow start up on page 9)
Problem
Fluid not  owing through unit
No Clicking
Sound
Fluid  owing through unit
Injector in Operation or After Scheduled Maintenance
Problem
Main Piston Assembly #9 worn
Cover #1 or lower housing #40
worn or scored
No Clicking
On/Off Lever in off position
Sound
By-Pass Valve not closed
Dirty or plugged inlet  lter
#17 Worn or not seated properly
Problem
Cracked or loose Suction Hose
Dosage piston #44 (5% - #52) worn
or installed incorrectly
O-ring support nut #88 installed
Clicking
incorrectly
Sound
O-ring seat #14 or dosage piston
No Suction Of
#44 (5% - #52) damaged
Solution
Suction tube #25 or suction tube
 tting #11 cracked, leaking or
clogged suction tube  lter
Check valve #13 leaking
Problem
Clicking #44 (5% - #52) Dosage Piston worn Replace.
Sound, #7 Inner Cylinder worn
Unit operates at high- ow and not
Under
at low  ow
Injecting or
Main Piston Assembly #9 worn
No Clicking on
Cover #1 or lower housing #40
Low Flow
worn or scored
Problem
Check valve #13 leaking
Fluid
Re- lling
Washer seal on #13 is swollen or
Solution Tank
chemical attack
English: 14

Troubleshooting

Cause
Are the red plugs at the inlet and outlet openings removed?
Is the unit installed backward? The arrow on the unit must point in the
direction of the  uid  ow.
Has the new injector been stored for an extended period. If so, submerge the
injector in room temperature  uid for 24 hours so that the working parts can
reabsorb  uid and swell back to the proper size.
If still not clicking, do not open the upper body. Call Dosmatic Customer
Service.
Fluid rate is below or exceeds rated service  ow of injector. (see Speci cations
page 6).
If below increase  ow rate, if above, reduce  ow rate.
Operating pressure exceeds maximum limit. Install a pressure reducer valve.
(see Speci cations page 6).
On/Off Lever in off position. Place the On/Off lever switch to the ON position.
By-Pass Valve not closed. Check and set valve to the OFF position.
Cause
Replace # 9 Main Piston Assembly. Clean  uid  lter.
Replace.
Place the On/Off lever switch to the ON position.
Set Valve to the closed position.
Ensure mesh size is correct for proper  ltration. Clean  lter.
Re-seat #17 or replace.
Cause
Check for proper  t and /or replace.
Replace. Ensure during maintenance replacement that #44 dosage
piston was installed correctly  ared-end up.
Install correctly.
Replace.
Replace and/or clean as necessary.
Clean & replace as necessary.
Cause
Replace.
Replace #17 O-ring.
Replace # 9 Main Piston Assembly. Clean  uid  lter.
Replace. Install or clean  uid  lter.
Cause
Check seat area on suction tube  tting #11. Check valve and seal must
 t loose in the suction tube  tting. Clean seal and inside  tting for debris.
Replace with new check valve assembly.
Solution
Solution
Solution
Solution
Solution