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Xylem Lowara Q-smart Installation, Operation & Maintenance Manual page 54

Single phase electronic control panel

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  • ENGLISH, page 32
en - Original instructions
The Auto-test of pump 1 has failed. The test is
stopped due to intervention of the membrane
pressure switch connected to the D IN PROG
(c38=1). The pressure in delivery side achieves
the setting of the pressure switch.
Causes/solutions
The pump (impeller or diffuser) is damaged.
Contact the technical assistance service.
The motor pump 1 doesn't run:
It is damaged and must be replaced.
o
Contact the technical assistance service.
The thermal protector inside the motor
o
is faulty or broken.
The capacitor is damaged.
o
Description
A25
Auto-test pump 2 failed
Troubleshooting:
The Auto-test of pump 2 has failed. The test is
stopped due to intervention of the membrane
pressure switch connected to the D IN PROG
(c38=1). The pressure in delivery side achieves
the setting of the pressure switch.
Causes/solutions
The pump (impeller or diffuser) is damaged.
Contact the technical assistance service.
The motor doesn't run:
It is damaged and must be replaced.
o
Contact the technical assistance ser-
vice.
The thermal protector inside the motor
o
is faulty or broken.
The capacitor is damaged.
o
Description
A36
High pressure alarm
Troubleshooting:
The pressure value has reached the set value of
the high pressure switch P MAX.
All the pumps are stopped.
The alarm is excluded in manual mode.
Causes/solutions
The pressure has reached the set value of the
high pressure switch P MAX: check the pump
performance curve and the proper set point
(r07) or thresholds of the pumps (r11, r13).
If the alarm appears but the pressure value
does not reach the value of the pressure
switch P MAX:
The maximum pressure switch must be
o
replaced.
The cable of the pressure switch is
o
faulty or worn, replace it.
Check
connection of the pressure
o
switch P MAX to the Q-SMART control
panel terminal (see figures 6,
The pressure switch P MAX is dam-
o
aged, replace it.
54
Reset
Auto
Reset
Auto
7
and 9).
Description
A37
Minimum pressure alarm
Troubleshooting:
The pressure value has reached the set value of
the minimum pressure switch P MIN. LEDs (4), (6)
on.
All the pumps are stopped.
The alarm is excluded in manual mode.
Causes/solutions
The pressure has reached the set value of the
minimum pressure switch P MIN. Check the
pump performance curve and the proper set
point (r07) or thresholds of the pumps (r10,
r12).
If the alarm appears but the pressure value
has not reached the set value of the pressure
switch P MIN:
The pressure switch P MIN is damaged
o
and must be replaced.
The cable of the pressure switch is
o
faulty or worn, replace it.
Check connection of the pressure switch
o
P MIN to the Q-SMART control panel
terminal (refer to figures 6,
The pump (impeller or diffuser) is damaged.
Contact the technical assistance service.
The motor doesn't run:
It is damaged and must be replaced.
o
Contact the technical assistance ser-
vice.
The thermal protector inside the motor
o
is faulty or broken.
The capacitor is broken.
o
Description
A38
Minimum pressure out of op-
eration range.
Troubleshooting:
Tripping of the protection against operation of the
pump below the minimum pressure. The signal
arrives from the minimum pressure switch con-
nected to the digital input D IN PROG (c38=1). If it
appears during normal operation instead of during
the auto-test phase, all the pumps are enabled in
order after the set delay time (t38) to restore the
pressure.
Causes/solutions
There is an alarm but the pumps are stopped:
The pressure switch is faulty or its cable
o
is damaged. Replace the pressure
switch or cable.
Incorrect setting of the pressure switch,
o
change it.
There is an alarm but the pumps are running:
The pressure switch is faulty or its cable
o
is damaged. Replace the pressure
switch or cable.
Reset
Auto
7
and 9).
Reset
Auto

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