Nordic ATWC Series, Installation And Service Manual, Page: 41 / 106

PRELIMINARY: 24-Sep-2021 Page 41 002536MAN-00
View-->Alarms, Limits and Faults (FAULTS tab):
This tab shows hardware faults that could occur. If one of these faults occurs there may be a problem with the control board hard-
ware, with LCD Display and buttons, or with a sensor.
If a fault occurs, some things to try:

Turn the power to the heat pump off for 20 seconds and then back on again.

Use the menu item
Tools-->Reset to Factory Defaults
. If this clears the fault then the system configuration will have to be
set up again.

For LCD Display or Menu Button faults, turn off the power, disconnect and reconnect the cable between the LCD display board
and the control board, then turn the power back on again.
If the fault persists then there is most likely a hardware problem, and the sensor, control board, or LCD display board will
need to be replaced.
IMPORTANT NOTE: If the Indoor OUT (I_OUT) probe is faulty or disconnected, neither hydronic heating nor the auxiliary will operate
if using Setpoint Control. They will continue to operate under Signals or BACnet control.
Greyed out do not apply.
Fault Indicators
Erase the com-
pressor statistics
(only for if a
compressor
should need to
be replaced).
View-->Stage Stats
:
The compressor information: number of starts, run hours and starts per hour.
View-->Set Stage 2 Delay
:
Sets the delay before stage 2 is
engaged on a stage 1 demand.
(“0” = no stage 2 engaged on a
stage 1 call)
View-->Defrost History
:
Same as clicking on HISTORY button in Control Panel window (see previous page).
NEEDS
UPDATE