Wilo Atmos GIGA-B, Installation And Operating Instructions Manual

Page: 63 / 68

Faults, causes and remedies en
Installation and operating instructions Wilo-Atmos GIGA-I/-B 63
Screw connection Tightening torque
Nm ± 10 %
Post Size/tensile strength class
Installation information:
1)
Lubricate the thread with Molykote® P37 or comparable.
2)
Tighten the screws uniformly, keep the gap even on both sides.
3)
Rescrew and tighten every screw separately.
Table 5: Screw tightening torques
11 Faults, causes and remedies
WARNING
Have faults remedied by qualified personnel only! Observe all safety in-
structions!
If the malfunction cannot be rectified, consult a specialist technician or the nearest
Wilo customer service or representative location.
Faults Causes Remedies
Pump does not start or
stops working.
Pump blocked. Electrically isolate the motor.
Remove the cause of the
blocking. Motor blocking:
Overhaul/replace motor/motor
impeller unit.
Incorrectly installed mech-
anical seal.
Remove the mechanical seal;
replace defective parts; install
mechanical seal in accordance
to the instructions.
Cable terminal loose.
Check all cable connections.
Fuse protection defect.
Check fuses; replace faulty
fuses.
Motor damaged.
Have the motor checked by the
Wilo customer service or a spe-
cialised service centre and re-
paired if necessary.
Motor protection switch
has triggered.
Set the pump to the rated
volume flow on the discharge
side (see rating plate).
Motor protection switch set
incorrectly
Set the motor protection
switch to the correct rated cur-
rent (see rating plate).
Motor protection switch af-
fected by excessive ambi-
ent temperature Move the motor protection
switch or protect it using heat
insulation.
PTC thermistor tripping unit
has triggered.
Check the motor and fan cover
for contamination and clean
them if necessary.
Check the ambient temper-
ature and, if necessary, set the
ambient temperature to
≤ 40 °C by forced ventilation.