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The display shows
[Battery operation ]
[NRV opened]
[Battery error / Insert
battery]
[Battery error / Replace
battery]
[Error motor fault]
[NRV opened]
[Back pressure]
[Close emergency lock]
1)
The components integrated into the cover cannot be replaced individually.
Grundfix Plus Control backflow trap type 3
In the event of back flow, set the emergency lock to the "ZU (OFF)"
▶
position.
▶
Repair or have faults repaired in accordance with this table:
NOTICE!
to [Normal operation] after attempted troubleshooting, seek
help from a trade professional.
Possible cause
Power failure, circuit
breaker has activated
Rechargeable battery is
missing or rechargeable
battery fuse or cabling
is defective
Rechargeable battery
faulty
This error is displayed if
a back flow is recog‐
nised in normal opera‐
tion and the motor-
powered flap cannot be
closed due to an motor
defect or foreign body
blocking it.
Motor defective
n
Motor spindle
n
broken
Motor-powered flap
n
blocked
If the control does not automatically switch back
Troubleshooting by
Operators
Trade professionals
Operators
Operators
Handling
Troubleshooting meas‐
ures
The power supply is
automatically taken
over by the battery
(approx. 24 hours) until
the mains voltage is
restored.
Safety against back
flow is guaranteed.
Check mains cable
n
connection
Check mains circuit
n
breakers
Check rechargeable
n
battery / Recharge‐
able battery fuse
Check cabling
n
No safeguarding
against back flow in
case of power outage.
Replace rechargeable
battery
Note: In case of back
flow, there is a risk of
flooding - Set the emer‐
gency lock to "ZU"
(OFF) position.
Trigger the self-test
with T3 button:
If the motor doesn't
n
begin immediately,
check the cable con‐
nections in the con‐
trol unit. If the error
message remains,
replace cover (model
4987.418)
1)
.
32
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