Fault Codes; Ehc-05 Alarm Codes; Scb-10 Alarm Codes - DeDietrich HPI S User Manual

Tab.24 List of fault codes
Error Message
code
E00.00 TFlow Open
E00.01 TFlow Closed
E02.13 Blocking Input
E02.24 System flow locking
Tab.25 List of alarm codes
Error code Message
A02.06 Water Press Warning
A02.18 OBD Error
A02.22 System flow warning
A02.55 Inval or miss SerNR
A02.80 Missing Cascade Ctrl
7684505 - v03 - 14052020
6.1.4

Fault codes

If a fault code is still present after several automatic start-up attempts, the
heat pump switches to error mode.
The heat pump will only resume normal operation once the causes of the
fault have been eliminated by the installer.
When one of the following codes is displayed and the heat pump cannot
restart automatically, contact a maintenance technician.
Description
Flow temperature sensor is either removed or measures a temperature below range
Flow temperature sensor is either shorted or measures a temperature above range
Blocking Input of the Control Unit from device external environment
Input BL open.
System water flow locking active
Insufficient flow: open a radiator valve
The circuit is clogged:
Check that the filters are not obstructed and clean them if necessary.
Clean and flush the installation.
No circulation:
Check that the valves and thermostatic valves are open.
Check that the filters are not obstructed.
Check that the circulating pump is working.
Check the wiring.
Check the pump supply: if the pump does not work, replace it.
6.1.5 EHC–05 alarm codes
An alarm code is a temporary heat pump status, resulting from the
detection of an anomaly. If an alarm code still remains after several
automatic start-up attempts, the system goes into fault mode.
When one of the following codes is displayed and the heat pump cannot
restart automatically, contact a maintenance technician.
Description
Water Pressure Warning active
Object Dictionary Error
System water flow warning active
Invalid or missing device serial number
Missing Cascade controller
6.1.6

SCB-10 alarm codes

An alarm code is a temporary heat pump status, resulting from the
detection of an anomaly. If an alarm code still remains after several
automatic start-up attempts, the system goes into fault mode.
When one of the following codes is displayed and the heat pump cannot
restart automatically, contact a maintenance technician.
6 Troubleshooting
MIT-S 31