Faults, causes and remedies
zh-CHS
安装及操作说明 Wilo-Atmos TERA-SCH
89
Error type
Description
3
Pump end pressure too high
4
Bearing temperature too high
5
Pump housing leakage
6
Shaft seal leakage
7
Pump does not run smoothly or is loud
8
Pump temperature too high
表 20:
Error types
10.2
Causes and remedies
Error type:
1
2
3
4
5
6
7
8
Cause
Remedy
X
Counter pressure too
high
– Check system for
contaminants
– Reset the duty point
X
X
X
Pump and/or piping not
completely filled
– Vent pump and fill
suction line
X
X
X
Inlet pressure too low or
negative suction head
too high
– Correct the fluid level
– Minimise resistances
in the suction line
– Clean filter
– Reduce negative
suction head by
installing the pump
lower
X
X
X
Sealing gap too large
due to wear
– Exchange worn wear
ring
X
Incorrect direction of
rotation
– Change the motor
connection phases
X
Pump sucks air or the
suction line is leaky
– Replace gasket
– Check suction line
X
Supply line or impeller
clogged
– Remove clog
X
X
Pump blocked by loose
or jammed parts
– Clean pump
X
Air pockets in the piping – Change the pipe
layout or install an air
vent valve
X
Speed too low
– with frequency
converter operation
– without frequency
converter operation
– Increase frequency in
the permissible range
– Check voltage
X
X
Motor running on
2 phases
– Check phases and
fuses
X
X
Counter pressure of the
pump too low
– Readjust the duty
point or adjust the
impeller
X
The viscosity or density
of the fluid is higher
than the design value
– Check the pump
dimensioning (consult
with the manufacturer)
X
X
X
X
X
The pump is strained
Correct the pump
installation
X
X
Speed too high
Lower speed
X
X
X
Pump unit poorly
aligned
– Correct alignment
