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Hi, I'm Brian. I'm here to answer your HVAC question to your complete satisfaction! I have worked on a great deal of Honeywell zoning systems but never the hz311 but I have looked up the documentation and thought I might be able to help.
What is the brand and model heating/cooling thermostat connected to the HZ311 controller?
Hi BrianI am not sure but I will find out, this unit just stopped working last week. When the thermostat is set to cool the damper for that zone opens but the air handler or compressor wont start. hope that helps.
Yes but you say that if you put that same thermostat on "fan on" the fan comes on so that is a bit strange. If I understand the 311 correctly if any zone calls for cool that zone damper should open and the system should call for fan and cooling. Because the fan comes on that tells me the air handler is fine and the control circuit should be fine for the cooling. If you have a voltmeter that can read 24-28 volts ac and a couple of jumper wires we can probably narrow down the problem to the suspect component.
Yes I have a voltmeter what should I jump?
Ok great. Is your heating/cooling system an air handler with heat, a furnace with a coil or a heat pump?
Well regardless of system type, with all your thermostats turned off you should check that you have 24-28 volts ac between terminals Rh/Rc and Y, W and G respectively on the terminal strip marked 'equipment'. That will tell us that the control circuit for your heating/cooling system is all intact. You can then jumper Rc/Rh to G and your air handler fan should come on. Jumping Rc/Rh to Y should bring on your compressor outside. If that all works then your equipment is fine and the problem either lay in the thermostat(s) connected to the zone terminal strips or the Zone controller itself. Let me know what you find with these tests and we can go from there.
It almost seems you may be having trouble reading my posts or having trouble with the chat format here. I think it would be best if I switch to the Q/A format where we exchange messages back and forth with a lot more reliability. It is a little slower that is all.
Ok unable to work on it tonight I will touch base with you tomorrow about the outside unit