PROBLEM
Mikro-Master 300 does not operate.
Pump does not stroke.
Pump strokes too fast (80 strokes per
minute is maximum to avoid damage
to the pump).
Pump will not prime or will not pump
product.
Pump will not pump against system
pressure.
7.0 TROUBLESHOOTING
CAUSE OR FAILURE MODE
No 120VAC power.
Internal - OFF - External switch on
pump in OFF position.
No water flow through the system.
Interconnecting cable between the flow
meter and the pump is disconnected or
loose.
Water flow through the system is less
than 1/2 gpm.
The programmable divider's plastic
window is not installed or is loose.
Internal - OFF - External switch on
pump in OFF position
Divider number on programmable
divider is set at a high dosage ratio.
Flow meter faulty.
Pump is faulty.
Interconnecting cable between the flow
meter and pump is disconnected or
loose.
Divider number of programmable
divider is set at a low dosage ratio
number.
Ceramic valve balls in pump head bad
or missing.
Teflon seal rings bad or missing.
Coupling nuts on pump leaking or
cracked.
Diaphragm is leaking or cracked.
Pressure release cap assembly or anti-
siphon cap assembly on anti-siphon
valve faulty or cracked.
Suction drum probe faulty.
Improper installation where system
pressure exceeds 70 psi (4.8 bar).
ACTION
Check power source to pump.
Place switch in External position.
Check and correct as necessary.
Check and correct as necessary.
Increase water flow through the
system to more than 1 gpm.
Install window or tighten mounting
screw as necessary.
Place switch in External position.
Set divider number down.
Replace sensor.
Replace pump.
Check and correct as necessary.
Set divider number up.
Replace faulty or missing balls from
spare parts kit.
Replace faulty or missing seal rings
from spare parts kit.
Replace leaking or cracked coupling
nuts from spare parts kit.
Replace leaking or cracked diaphragm
from spare parts kit.
Replace pressure release cap
assembly or anti-siphon cap assembly
from spare parts kit.
Replace suction drum probe.
Install pressure regulator to Mikro-
Master 300 system.
6