APPENDIX B
HeatNet Control REV 1.38-1
Page 78
Line 4 Log Entries:
The following table lists the messages on line # 4 of the log’s display.
Line # 4 Message
Description
SETBACK IS ACTIVE
SETBACK EXPIRED
If any of the (4) temperature setbacks are active these log entries will
be displayed in the log.
NO LOCAL FLOW
NO SYSTEM FLOW
If the test for flow fails these log entries will be displayed. The flow
proving switches are wired to J11A and J11B.
COMBUSTION AIR FAIL
If the combustion air damper is used and does not prove across
J12B DAMPER, this message is displayed.
SYSTEM RESET -- ----
O: stack overflow,
U: Stack Underflow ( both are software faults)
R: Reset Instruction ( Firmware or Default load),
W: Watchdog ( Firmware code ran erroneous code and
rebooted),
P: Power-ON (Power switch toggled),
B: Brown-out ( Microcontroller saw a voltage less than
4.5 VDC)
When the control is reset, this log entry captures the reason the reset
occurred.
OUTDOOR RESET
This log entry indicates that Warm Weather Shutdown is in effect.
HIGH DELTA TEMP
This log entry occurs when the temperature across the heat
exchanger has been greater than 40 degrees
°
F.
