40
738.955 | 10.40
EN
Short-circuit
symbol
and
warning
sign
appear.
Secondary
symptoms Possible
cause
/
remedy
The pump symbol
does not rotate
Display background
alternately flashes
red and yellow
Pump stops in the
case of a short-circuit
(only applies to T1
or T
)
•
•
•
Short-circuit in the tem-
perature sensor or its sup-
ply cable
Have professional per-
sonnel check the tem-
perature sensor supply
cable and the connec-
tions to the controller.
NOTE
The pump does not stop running in the case of a short-
circuit in the Grundfos Direct Sensors
TM
VFS 1-1
T or Q.
Interruption
symbol
and
warning
sign
appear.
Secondary
symptoms
Possible
cause
/
remedy
The pump symbol
does not rotate
Display background
alternately flashes red
and yellow
Sun symbol goes out
Pump stops in the
case of an interruption
(only applies to T1 or
T
)
•
•
•
•
Temperature sensor T1
or T
or its supply cable
is interrupted
Have professional
personnel check the
temperature sensor
supply cable and the
connections to the
controller.
T1
!
Short-circuit and warning sign
(example)
T1
!
Short-circuit and warning sign
(example)
T1
!
Interruption and warning sign
(example)
T1
!
Interruption and warning sign
(example)
Содержание TR A301
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