Error Codes; Display Description; Sensor Failure - Danfoss RET2001OT - V2 Bedienungsanleitung

Installation Guide
2 . Dimensions and Wiring
Dimensions, see fig . 4 on page 45 . Wiring diagram .
Important – To avoid damage to Boiler and Thermostat, connect
only to OpenTherm connections on boiler, do not connect to any
other power source.
By connecting a volt free switch over terminals 1 & 2 you can pro-
vide an external override to enable a forced set back condition with
minimum 5 °C frost protection.

3 . Error codes

Display Description

E1

Sensor Failure

EE EEPROM Failure
Lo Measured temperature below 0 °C
Hi Measure temperature above 50 °C
E2 OT Communication Failure
Danfoss Climate Solutions
RET2001OT - V2
OpenTherm
OpenTherm
connections connections
in RET2001OT
in RET2001OT
Set-back
Set-back
connections
connections
in RET2001OT
in RET2001OT
AN30483479654801-010102
A
OpenTherm
OpenTherm
B
connections
connections
in boiler
in boiler
Wires can
be crossed
Wires can
be crossed
1
External volt
External volt
free contactor/
2 free contactor/
switch
switch
EN
5