Error Code Description
41
You have attempted to write to the Flash memory a second time which is not permitted.
You may only write to the Flash memory one time after reprogramming. If you need to
write to the Flash memory again, reprogram the heating system with ETS208 software or
greater and then reconfigure. Reference Locations 98 and 99 (L098 and L099).
42
If the check sum fails in the Flash copy of the settings or if the initial write to the Flash fails,
Er42 is displayed. Reprogram the heating system or replace the processor control board.
43
An attempt to load a saved configuration by setting Location 98 (L098) to a value of 20,
30, 40, or 50 has failed. Any changes to location values will need to be manually set. Press
and release the “M” button to clear the error. Er43 is only applicable to processor control
boards with a revision level of G or lower only.
44
The check sum of the entire Flash is corrupt. Reprogram the heating system or replace the
processor control board.
45
An attempt was made to load memory from an unsaved location in L098. Applicable to
processor control boards with a revision level of H or higher only.
46
MA command or Pulse Width Modulation has timed out. No input has been received for
30 minutes. If the MA command or Pulse Width Modulation are not being used, verify that
Location 53 (L053) and/or Location 55 (L055) are set correctly for the application.
47
The Relay Driver Board is incompatible with the software version of the processor control
board. Update the relay driver board.
Cold Core The sensed temperature of the brick core is below 40 degrees. This may be an actual
condition, a defective thermocouple, reversed polarity of thermocouple wiring coupled
with a core temperature between 150°F (65°C) and 300°F (148°C), or a circuit board which
is out of calibration can cause this. Verify that the core thermocouple wiring is connected
properly and that the values in L090, L091 and L092 are correct for the application.
Core Fail One of the core high limit switches may be open (also see error 38).
PLC Fail
The heater is configured for power line carrier; however, is not receiving a valid power line
carrier communication signal. This will display as error 25 when using BACNet and PLC fail
on the system display.
LoAd CAP All controllable loads have been shed and Maximum Load Capacity is still exceeded.
This is not necessarily an error but merely an indication of the current condition of the
application. Example: If 4-20mA control is being used and comfort override or freeze
protection brings on elements, this error code may be displayed.
T
herm
e
lecT
h
ydronic
a
ppendix
| a.13
