Indicator Lights:

Red = Flickers, on 90% of the time, this indicates the unit is functioning properly.
Yellow = Receive
Green = Transmit

Are you having trouble with your Microzone II Controllers?

Are the controllers reporting offline?

Do the digital outputs fail intermittently?

Are the analog inputs reading true?

Are the analog outputs failing intermittently?

The answer to your MZII problems could be found here.

Look at the back of the MZII base and carefully inspect the solder connections for the screw terminals.

We have found many, if not all the solder connections for the screw terminals to be cracked and causing intermittent failures.

To repair: re-solder connections.

Here is an example of the solder connections, >>>Solder Connections 329KB<<<

MICROZONE II Block Library

AO- Analog Output -Total of 4

DO - Digital Output -Total of 8

EMS - GCM™ Input

HOLI - Holiday Schedule

LOOP - Complex PID Loops

OSS - Optimum Start/Stop

RESET - Set point Reset

RGRP - Receive Global Group Data

SCHED - Weekly/Daily Schedule

SEQ - Linear/Binary Sequencer

UI - Universal Input - Total of 8

UTIL Utility – Counter-Drive-Flow Detect
Limit-Logic-Math
Stop/Start-Process Alarm-Switch
High/Low-Pulse Width Modulation
Thermostat-Status-Timer

WINDO - Window Output to GCM

10 k Ohm shunt resistor kit is used for high speed count input

250 Ohm shunt resistor kit is used for 4 to 20 mA analog input

11 k Ohm shunt resistor kit is used for 10 k thermistor input

120 Ohm End of Line Resistor is used on ASD Bus