A MicroZone II (MZ2) indicates "cold reset" or "warm reset". What do these error messages mean?
MicroZone II (MZ2) controller
The error messages are in response to interruptions to the controller's 24 Vac power.
For a detailed explanation of the "cold reset" and "warm reset" messages, see the MicroZone II Programmer's Manual, F-23118, "System Resets". Click here to see an excerpt from the manual.