Troubleshooting - Hydro Systems DOSMATIC MINIDOS NPT 0.4% Manual De Operación

New Install - Always Pressure Up Slowly (Follow start up on page 9)
Problem
No Clicking
Sound
Injector in Operation or After Scheduled Maintenance
Problem
No Clicking
Sound
Problem
Clicking
Sound
No Suction Of
Solution
Problem
Clicking
Sound.
Under
Injecting
Problem
Fluid
Re-filling
Solution Tank
English: 16

Troubleshooting

Cause
Are the red plugs at the inlet, outlet and suction tube fitting openings removed?
Is the unit installed backward? The arrow on the unit must point in the
direction of the fluid flow.
Fluid not flowing through unit
Has the new injector been stored for an extended period. If so, submerge the
injector in room temperature water for 24 hours so that the working parts can
reabsorb fluid 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 flow of injector. (See Specifications
page 6).
If below increase flow rate, if above, reduce flow rate.
Fluid flowing through unit
Operating pressure exceeds maximum limit. Install a pressure reducer valve.
(See Specifications for maximum flow rate 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
Main Piston Assembly #9 worn
Cover #1 or main body #40 worn
or scored
On/Off Lever in off position
By-Pass Valve not closed
Dirty or plugged inlet filter
#17 Worn or not seated properly
Cause
Suction tube #25 (#60 - 20%) or
suction tube fitting #11 cracked,
loose, leaking or clogged suction
tube filter.
Dosage piston #44 worn or
installed incorrectly, inner cylinder
#37 (#68 - 1% & #7 - 20%) worn
O-ring retainer #82 (#15 - 10% &
20%) installed incorrectly
O-ring seat #14 or dosage piston
#44 damaged or worn
Check valve #13 (#60 - 20%)
leaking.
Cause
#44 Dosage Piston worn
#37 (#7 - 20%) Inner Cylinder worn
Unit operates at high-flow and not
at low flow
Main Piston Assembly #9 worn
Cover #1 or main body #40 worn
or scored
Cause
Check valve #13 leaking
Washer seal on #13 is swollen or
chemical attack
Hose Kit #60 (20%) leaking
Solution
Solution
Replace # 9 Main Piston Assembly. Clean fluid filter.
Replace and install or clean fluid filter.
Place the On/Off lever switch to the ON position.
Set Valve to the closed position.
Ensure mesh size is correct for proper filtration. Clean filter.
Re-seat #17 or replace.
Solution
Check for proper fit, replace and/or clean as necessary.
Replace. Ensure during maintenance replacement that #44 dosage
piston was installed correctly flared-end up.
Install correctly.
Replace, on 0.4% models replace #51 Shaft Assembly.
Clean & replace as necessary.
Solution
Replace, on 0.4% models replace #51 Shaft Assembly.
Replace.
Replace #17 O-ring.
Replace # 9 Main Piston Assembly. Clean fluid filter.
Replace and install or clean fluid filter
Solution
Check seat area on suction tube fitting #11. Check valve and seal must
fit loose in the suction tube fitting. Clean seal and inside fitting for debris.
Replace with new check valve assembly.
Replace
.