Danfoss RET2001 User manual

User Guide
RET2001
Digital Room Thermostat
www.heating.danfoss.com

User Guide RET2001 Digital Room Thermostats
2Danfoss Heating VUSUD102 08/2020
1 LCD Overview
Symbols Function description Symbols Function description
Parameter number
insetup Frost protect active
Room temperature Away mode
Temperature indication RF Status
(RET2001RF only)
SET
Set temperature
Battery low indicator
(RET2001B & RET2001RF
only)
Heating active
2 Buttons
Symbols Function description
Power on/o
MMode change / option
setting
< > Temperature / option
setting selectors
3 Power ON/OFF
Turn the thermostat ON or OFF (Standby) by pressing .
4 Setting the Temperature
• Press <or >at any time to change the desired temperature value. SET is shown in the display.
• When releasing <or >, the display returns to showing the actual temperature.
• The adjustment step is 0.5 °C.
5 Select Away Mode
• Press Mto enter Away mode and will be displayed.
• Away mode temperature can be set in parameter settings, P07.
• Press Magain to exit Away mode.

User Guide RET2001 Digital Room Thermostats
Danfoss Heating VUSUD102 08/2020 3
6 Frost Protection Temperature and Reset
• You can switch the thermostat OFF (Standby) by alternately pressing . In OFF (Standby) mode, thethermo-
stat is set to a Frost Protection temperature setting and will switch On only if the measured temperature falls
below this temperature (5 °C by default).
• The frost protect icon and current temperature will be displayed.
• At this point, if the button is pressed for 10 seconds Continuously then the thermostat will be reset.
7 Set Control Parameters
• Press M button for 6 seconds to enter the parameter setting mode. Press M for parameter selection and set
the parameter range via < or >. Complete all adjustments.
• To exit press upper part of setting ring or wait 20 secs for automatic exit.
The digits indicate the set value as follows:
No. Parameter settings Settings range Default
P02 Heat control mode 01: On/o load compensation
02: On/o standard 01
P04 Temperature limit high Between low (P05) and 35 °C 35 °C
P05 Temperature limit low Between 5 °C and high (P04) 5 °C
P06 Frost protect temperature Between 5 °C and 15 °C 5 °C
P07 Away mode temperature Between low (P05) and high (P04) 18 °C
P10 RF Pairing (RET2001RF only) 00: RF pairing mode o
01: RF pairing mode on 00
8 Error Messages
E1 Sensor failure
EE EEPROM failure
Lo Measured temperature below 0 °C
Hi Measured temperature above 50 °C
E3 RF Pairing failed
E4 RF Signal lost

User Guide RET2001 Digital Room Thermostats
Danfoss Heating VUSUD102 | BC306935120286EN-000102 08/2020