© 2013
553_D - 04/13
44 of 48
A Watts Water Technologies Company
Error Message
Description
DISPLAY MENU SAVE ERROR
The thermostat failed to read the Display menu settings from memory
and has reloaded the factory default settings. The thermostat continues
to operate normally while displaying this error.
To clear the error, set the access level to Installer and check all settings
in the Display menu.
tN2 PORT ERROR
The thermostat has been connected to a tN2 zone already in use by
a 2-stage zoning control. A 2-stage device requires two tN2 ports to
operate. This device may be connected to one such port. This error may
also occur if 24 V (ac) is incorrectly wired to the tN2 wiring terminals.
To clear the error, move the thermostat’s tN2 wires to an unused tN2
port on the zoning control or check the tN2 wires for 24 V (ac).
NO SENSOR ON ERROR
All of the temperature sensors have been set to Off including the
built-in room sensor.
To clear the error, the Room Sensor, Sensor 1 or 2 must be set to
measure an air or floor temperature.
NO HEAT RELAY
There are no heat relays configured.
To clear the error, set W TERM to HRF1, HRF2, CONV, COIL, FURN
or OTHR, or set ACC RELAY to W2.
W2 SOURCE BUS CONFIGURATION ERROR
The backup W2 heat source has been changed on the tekmarNet
®
System Control. To clear the error, check the Backup W2 Source
setting in the Setup menu.
tekmarNet
®
COMMUNICATION ERROR
The tekmarNet
®
communication bus has either an open or a short
circuit. The result is that there are no communications. Check for loose
wires between tN4 and C. Check for short circuits between the tN4
and C wires on the House Control, Wiring Center, or Zone Manager.
Check for correct polarity between the C and R wires.
The error clears automatically once the wiring fault has been
corrected.
To force the error to clear while allowing a short or open circuit to
continue, touch the Cancel key.
ADDRESS ERROR
Two thermostats have been manually set to the same address. The
thermostat continues to operate with this error but does not communicate
with the tekmarNet
®
system.
To clear this error, select an unused tekmarNet
®
address or select
automatic addressing.
Error Messages (2 of 5)