Grundfos SCALA2 Instructions Manual page 16

9.1.1 Pressure indicator, SCALA2
The pressure indicator shows the required outlet pressure from 1.5
to 5.5 bars (22 to 80 psi) in 0.5 bar (7.5 psi) intervals.
The illustration below shows a pump set to 3 bar (44 psi) indicated
by two green lights, and a pump set to 3.5 bar (51 psi) indicated by
one green light.
Flashing green lights indicate that the pump has automatically
lowered the pressure.
SCALA2 outlet pressure indication
BAR
5.5
}
5.0
4.5
}
4.0
3.5
}
3.0
2.5
}
2.0
1.5
Pressure indication table
Related information
7.3.3 Self-learning setpoint
16
PSI Water colum kPa MPa
[m]
80 55 550 0.55
73 50 500 0.50
65 45 450 0.45
58 40 400 0.40
51 35 350 0.35
44 30 300 0.30
36 25 250 0.25
30 20 200 0.20
22 15 150 0.15
9.1.2 Indicator lights for SCALA2
Indications Description
Operating indications
The operating panel is locked.
Power supply failure
The pump is blocked, for instance the shaft
seal has seized up.
Leakage in the system
Dry running or water shortage *
The maximum pressure has been exceeded
or the setpoint cannot be reached.
The maximum runtime has been exceeded.
The temperature is outside the range.
* For fault number 4, dry running, the pump must be reset manually.
For fault number 4, water shortage, and the remaining faults, 1, 2, 3, 5, 6
and 7, the pump will reset whenever the cause has disappeared or been
remedied.
For further information about system status, see section Fault
finding.
Related information
10.3.3 Auto reset
14.3 Fault finding chart