MINIPACK
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18
2.3.5 STANDARD/BASIC CONTROLLER SYSTEM WARNINGS & ALARMS
Flashing 2 digit display giving type of fault and a boiler/chiller volt free output signal for high or low pressure
condition.
Relay energised for normal condition and releases for a high or low pressure alarm fault condition.
Displayed Message
Cause
Check
L P
(Low pressure)
system pressure at/below low
pressure setting & delay timer expired
Pressure vessel air charge wrong? Or
water usage exceeds design capacity?
Or pump(s) are tripped or air locked.
L L
(Low water Level)
water level below supply tank low
water alarm probe or pipework sensor
dry. (240 second delay on automatic
restart, after restoration of water
level).
Break tank float valve stuck closed?
Or output of pumpset exceeds mains
water supply into break tank? Mains
water interruption to break tank?
H P
(High pressure)
system pressure at/above high
pressure setting & delay timer expired
Pressure vessel air charge wrong? Or
system water content exceeds design
capacity? Or pump(s) are continuously
running?.
O r
(system pressure Over Range)
Pressure sensor output above 9.9 Bar
or pressure sensor not connected
correctly.
Pressure higher than 9.9 Bar? Or
pressure sensor failed? Or pressure
sensor wiring loose?
S P
(setpoint point out of range)
The setpoint pressure has been set
either below 1.2 Bar or above 9.9 Bar.
Adjust setpoint pressure within
normal range.
No Display
1 Amp control fuse may have blown.
If unit has been switched off for a long
period, a turbine pump (where fitted)
may have seized. Switch off unit, insert
flat blade screwdriver into slot on end
of motor shaft and rotate pump until
free. Replace fuse with T1Ax20mm,
try again.
2.3.6 ENHANCED CONTROLLER SYSTEM WARNINGS
Flashing display giving type of fault and a various volt free output signals on BMS enhanced models.
(see wiring
diagram provided with unit to see which volt free signal relays are present. Typical example shown in fig. 1.7).
***** Warning *****
Cause
Check
High pressure approach
system pressure at high pressure
setting minus 0.2 Bar
Pressure vessel air charge wrong? Or
insufficient expansion capacity?
Low pressure approach
system pressure at low pressure
setting plus 0.2 Bar
Pressure vessel air charge wrong? Or
water usage exceeds design capacity?
Pump starts exceeded/is system
leaking?
duty pump starts exceeded “starts in
12 mins” parameter
System pipework is leaking
excessively? Starts parameter set too
low?
Excessive run time/ is system leaking?
duty pump continuously running for
12 minutes
System pipework is leaking
excessively?
Commissioning needed
Unit has not been commissioned by
authorised service engineer
Have unit commissioned by
authorised service engineer.
Power Up
Power interruption started “Power
Up” sequence
Incoming electrical supply
interruption? Or missing phase? Or
loose connections?
Low level delay
A low water level condition has reset,
and a 4 minute delay is now initiated
before normal operation will resume
Check pumps are vented and wait for
the delay time to expire
Manual restart
(when set to enabled)
A power interruption or low water
level has occurred,
Carry out all necessary checks, then
press the “Reset alarm” key on the
micro
