AEG DDLT PinControl 13 / 18 / 21 / 24 - Инструкция по эксплуатации - Страница 32

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6. 

Troubleshooting 

by the user

For users and contractors

Fault

Cause

Remedy

The heating system inside the 
instantaneous water heater will not 
start in spite of the tap being fully 
open.

No voltage.

User / Contractor:
Check the fuses in your fuse board.

The start-up volume required to start the 
heater has not been reached.  
Contamination or scaling of perlators in 
water taps or shower heads.

User / contractor:
Clean and / or descale.

Table 5

7. 

Troubleshooting 

by the contractor

Fault

Cause

Remedy

Stage II in the device will not start.

Pressure in the cold water line too low. 

Descale and if required replace shower 
head/perlator.

Contamination

Clean sieve ( 

A

 22).

Throughput volume controller ( 

A

7, output switch unit) will not start 
in spite of tap being fully opened.

The start-up volume required to start the 
heater has not been reached.

Clean sieve ( 

A

 22).

No hot water in spite of audible 
sound of the differential pressure 
switch starting.

Safety pressure limiter (AP 3) has switched 
the device off for safety reasons.

Remove cause of 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

8).

No voltage.

Check fuse/MCB (fuse box).

Heating system faulty.

Test the heating system resistor and 
replace if required.

Table 6