List of lockout codes (
type codes)
Tab.11
Code
Description
Checking / solution
The parameter storage unit for the PCU PCB is de
fective.
Contact the professional who handles mainte
nance of the appliance.
The top and middle domestic hot water tempera
ture sensors are defective.
Note: Domestic hot water production is not assur
ed.
Contact the professional who handles mainte
nance of the appliance.
The Air pressure too high alarm has been triggered
more than 3 times during the last 24 hours (Error
code
)
Note: Ventilation is no longer assured - Fan off
Contact the professional who handles mainte
nance of the appliance.
The LP pressure switch alarm has been triggered
more than 3 times during the last 24 hours (Error
code
)
Note: Domestic hot water production is assured by
the back-up, if the back-up is authorised.
Contact the professional who handles mainte
nance of the appliance.
The LP pressure switch alarm has been active for
more than 120 seconds.
Note: Domestic hot water production is assured by
the back-up, if the back-up is authorised.
Contact the professional who handles mainte
nance of the appliance.
7.2
Log of messages and faults
The Er bL 7 menu is used to consult the most recent messages and faults
displayed by the control panel.
Wire connection: display of the last 10 messages and last 10 faults
Radio connection: display of the last 4 messages and last 4 faults
1. Press the MENU key once.
The SEtP 1 menu is displayed.
2. Press the key 6 times.
The Er bL 7 menu is displayed.
3. Press the MODE key to go into this menu.
Tab.12
Accessing the
menu
Menu
Description
1x
Err
Error memory
2x
bL
History of lockouts
3x
CLr
Resets the lockout and error
memory to zero
Fig.31
C003203-E
1x
3
1
4
3
4
1
2
MENU
MODE
Fig.32
C004581-A
1
4
3
4
1
2
MENU
MODE
7 Troubleshooting
EN-7602920 - v10 - 24042019
TWH 200 EV
31
