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Troubleshooting - AEG DDLE Basis 11 Operating And Installation Instructions

Electronically controlled instantaneous water heater
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Table of Contents
For users and contractors
6.

Troubleshooting

Fault
The heating system inside the
instantaneous water heater will not
start in spite of the tap being fully open.
Intermittent cold water
Table 5
7.
Troubleshooting
Display options LED diagnostic "traffic lights"
Fault / Diagnostic
"traffic light" display*
Flow rate too low
Set temperature is not achieved
Heater does not switch on / no hot
water
No hot water
No "traffic light" display
No hot water; throughput> 3 l/min
Traffic light display:
green flashing or constantly ON
30
by the user
Cause
No voltage.
The start-up volume required to start the
heater has not been reached.
Contamination or scaling of perlators in
water taps or shower heads.
Heating system faulty.
The air sensor detects the presence of air
in water and briefly switches the heater
off.
by the contractor
red
illuminates in case of faults
yellow
illuminates when the equipment is heating water
green
flashing: the device is supplied with power
Cause
Shower head/perlators scaled up
Contamination
One phase down
The air sensor detects the presence of air
in water and briefly switches the heater
off.
Fuse/MCB blown/tripped
Safety pressure limiter AP 3 has tripped
Faulty electronics
Faulty electronics
Flow sensor DFE not plugged int
Flow sensor DFE faulty
Remedy
User / Contractor:
Check the fuses in your fuse board.
User / Contractor:
Clean and / or descale.
Call service / contractor:
Test heater and replace, if required.
Device starts again after one minute.
Remedy
Descale and replace, if required.
Clean sieve ( H 28)
Check fuse/MCB (fuse box).
Device starts again after one minute.
Check fuse/MCB (fuse box).
Remove the cause for the fault (e.g. faulty
pressure washer).
Open downstream tap for 1 minute.
This depressurises and cools down the
heating system, protecting it against
overheating.
Press the pushbutton on the safety
pressure limiter (push A 11).
Test the electronics PCB ( A 7) and
replace, if required.
Test the electronics PCB ( A 7) and
replace, if required.
Refit the plug of the electronics PCB.
Check and replace the flow switch, if
required.

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