Code
Display text
Description/Solution
E01.12
Return Higher Flow
Return tempearture has a higher temperature value than the flow temperature:
Bad connection: check the wiring and connectors.
Water circulation in wrong direction: check the circulation (direction, pump, valves).
Incorrectly fitted sensor: check that the sensor has been correctly fitted.
Malfunctioning sensor: check the Ohmic value of the sensor.
Faulty sensor: replace the sensor.
E02.13
Blocking Input
Blocking Input of the Control Unit from device external environment:
External cause: remove external cause.
Wrong parameter set: check the parameters.
E02.15
Ext CSU Timeout
External CSU Timeout:
Bad connection: check the wiring and connectors.
CSU faulty: replace the CSU.
E02.17
GVC CommTimeout
Gas Valve Control unit communication has exceeded feedback time:
Restart the boiler
Replace the CU-GH-08 control panel
E02.35
Safety device lost
Safety critical device has been disconnected
E02.47
Failed Conn Funct Gr
Failed Connecting Function Groups
E04.00
Parameter error
Safety parameters Level 5 are not correct or missing
E04.01
TFlow Closed
Flow temperature sensor is either shorted or measuring a temperature above range :
Bad connection: check the wiring and connectors.
Incorrectly fitted sensor: check that the sensor has been correctly fitted.
Faulty sensor: replace the sensor.
E04.02
TFlow Open
Flow temperature sensor is either removed or measuring a temperature below range:
Bad connection: check the wiring and connectors.
Faulty sensor: replace the sensor.
E04.03
Max Flow temp
Measured flow temperature above savety limit
E04.04
TFlue Closed
Flue temperature sensor is either shorted or measuring a temperature above range
E04.05
TFlue Open
Flue temperature sensor is either removed or measuring a temperature below range
E04.06
Max Flue temp
Measured flue temperature above limit
E04.07
TFlow Sensor
Deviation in flow sensor 1 and flow sensor 2 detected:
Bad connection: check the connection.
Faulty sensor: replace the sensor.
E04.08
Safety input
Safety input is open:
Non-return valve does not open.
Siphon blocked or empty.
Check that the air supply and flue gas discharge flues are not blocked.
Check the cleanliness of the heating body.
E04.09
TFlue Sensor
Deviation in flue sensor 1 and flue sensor 2 detected
11 Troubleshooting
84
MID _HMI T-control - Gas 120 ACE
7717201 - v03 - 25062019
