9.1.2
Lockout (
type code)
1. The display shows:
The symbol (!)
The symbol reset
The malfunction code (for example
).
2. After resolving the malfunction, press the reset key for 2 seconds. If
the error code is still shown, find the cause in the table of errors and
apply the solution.
List of lockout codes (
type codes)
Tab.17
Code
Description
Checking / solution
The parameter storage unit for the PCU PCB is de
fective.
Replace the PCU PCB.
The top and middle domestic hot water tempera
ture sensors are defective.
Note: Domestic hot water production is not assur
ed.
Incorrect connection
Check whether the sensor is connected.
Check the connection and the connectors.
Check that the sensor has been fitted properly.
Sensor failure
Check the Ohmic value of the sensor.
Replace the sensor if necessary.
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
Check the connection between the output X8 on
the PCB and the input CONTROL PWM FAN on
the fan.
Check that the fan is operating correctly.
Check the condition of the filter.
Check that the PCB is operating correctly.
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.
Check the position of the evaporator tempera
ture sensor.
Check that the fan is operating correctly.
Check that the condensates can flow freely.
Check the refrigerant charge.
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.
Check the position of the evaporator tempera
ture sensor.
Check that the fan is operating correctly.
Check that the condensates can flow freely.
9.2
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
Fig.61
C003212-B
2"
1
4
3
4
1
2
MENU
MODE
9 Troubleshooting
EN-7602142 - v11 - 24042019
TWH 200 EV
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