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11. The red "Alarm" indicator light
flashes three times per period,
and each pump start is delayed
a few seconds.
a) Too many start/stop sequences within a short period.
The pressure tank has no precharge pressure, or the tank
size is insufficient.
Check the tank precharge pressure, and
recharge the tank, if necessary.
If the size of the pressure tank is
insufficient, set DIP switch 5 to "OFF", or
replace the pressure tank.
b) Too many start/stop sequences within a short period.
The PM 2 is set to start/stop with 1 bar differential
pressure, i.e. DIP switch 5 is set to "ON", but no pressure
tank has been installed in the system.
Set DIP switch 5 to "OFF".
12. The red "Alarm" indicator light
flashes four times per periode.
a) Pressure sensor fault. Repair or replace the PM unit.
Fault Cause Remedy
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