Grundfos CU331SP, Installation And Operating Instructions Manual

Page: 13 / 24

13
English (US)
The second test is completed.
Write down the pressure and/or flow rate, and state which test
gave the highest pump performance:
• First test
• Second test
• Make new test.
The correct direction of rotation has now been set.
• Press OK to set the setpoint (8/11). See 11.3.6 Setpoint .
11.4 Menu GENERAL
The menu makes it possible to return to the start-up guide, which
is usually only used during the first start-up of the CU331SP.
11.4.1 Return to start-up guide (0.1)
State your choice:
• Yes
• No.
• If Yes is selected, all settings will be erased, and the entire
start-up guide must be completed.
11.4.2 Type code change (0.2)
This display is for service use only.
11.5 Menu OPERATION
11.5.1 Setpoint (1.1)
Setpoint set
Actual setpoint
Actual value
Set the setpoint in units of the feedback sensor.
11.5.2 Operating mode (1.2)
Set one of the following operating modes:
• Normal
• Max
• Min
• Stop
The operating modes can be set without changing the setpoint
setting.
11.5.3 Fault indications
Faults may result in two types of indication: Alarm or warning.
An "alarm" will activate an alarm indication in CU331SP and
cause the pump to change operating mode, typically to stop.
However, for some faults resulting in alarm, the pump is set to
continue operating even if there is an alarm.
A "warning" will activate a warning indication in CU331SP, but
the pump will not change operating or control mode.
Alarm (1.3)
In case of an alarm, the cause will appear in the display. See
14.1 Warning and alarm list .
Warning (1.4)
In case of warning, the cause will appear in the display. See
section
14.1 Warning and alarm list .
11.5.4 Fault log
For both fault types, alarm and warning, the CU331SP has a log
function.
Alarm log (1.5-1.9)
In case of an "alarm", the last five alarm indications will appear in
the alarm log. "Alarm log 1" shows the latest alarm, "Alarm log 2"
shows the latest alarm but one, etc.
The display shows three pieces of information:
• the alarm indication
• the alarm code
• the number of minutes the pump has been connected to the
power supply after the alarm occurred.
Note
Note
If the start-up guide is started, all previous
settings will be erased!
Note
Note
The start-up guide must be carried out on a cold
motor!
Repeating the start-up guide may lead to a
heating of the motor.