If your home comfort system isn't operating the way it used to, there are a few things you can check before calling for service.
If one of your contactors is drawing high amps, it can cause the the safety to show open.I have a ZJ048N06N2AAA1C. The type of protection varies depending on the type of compressor used.Since tandem compressors are used there is a single low pressure switch for system 1 and one for system 2. I had set the thermostat to cool the house while I was out and when I returned home it had switched off. Must check the gas pressure after the heat exchanger work. When I checked the furnace I was getting a amber 1 flash light.
There should be 24 volts present there.
td high. To trouble shoot the sensor verify 24 VAC between terminals EXC and COM of the sensor. I didn’t know if I needed to reset the computer board and if so how to do that. If you leave it alone, will it try 3 times before locking out? 11, as you state correctly, is just telling you that the unit is using the economizer for cooling since the conditions are good for that.
Is there anything I can do as a no pro to clear the situation. They think it’s the board again but I’m not to sure .serial number is incomplete — please provide whole number.
On the board is a single spade terminal marked “limit”. then you can see which safety is open8 to 10 time light flashing then start and stop the flash light continues flashing.. please provide the diagnosis code and also wiring diagramyou need to contact your local distributor for the wiring diagram or look on the doors — it is usually there in the unit..A “green” continuous flash on the upper LED is normal operationI am having problems with a FC7 code, what could be some likely causes for this code?FC 7 – Freeze stat trip on 1st stage.
Verify the presence of 24 VAC between PURGE connection at the P3 connector and “C” on the P1 connector.This alarm indicates the duct static pressure has exceeded the Duct Static Shutdown Setpoint. Do you have 24 volts at C1 and C2? When this occurs the Unit Controller will switch economizer operation to Single Enthalpy.This alarm indicates the IAQ (CO2) sensor is out of range.
hi there. If after the three retries the Unit Controller will lockout heating and cooling operation.This alarm indicates the call for supply fan operation has been terminated and after 90 seconds of supply fan operation the switch remained closed.
gas pressure high.
First of all right off I seen the power ventor was bad so replaced it. Pilot ignitor on it.
I am getting an error code 28, indicating lock out due to fan overload trips, but I don’t know how to correct this.
#ZJ037N09P2AAA5A which went into a fault. No sticking Contactors, perform a continuity test of T-stat wires leading too and away from unit, all good, only can turn unit off @ disconnect, once off stays off , until I go and call for either heat or cool, both work fine when called for.
Try recycling power to the control. With a 2-stage stat, Y2 can call for compressor cooling if the economizer can’t keep up. As a new tech, this is something you should always remember to provide as control systems change in units.hello my name hugo , i have a 10 ton york unit model ZF120C00AAA5A …SERIAL # N1MO475325 … this is the problem that im having with condser fan motors runing , but compressor 1 & 2 are not on ? Any INFO would help.are there any flash codes?
also believe older boards of simplicities where faulty. Everything fired up normally until after I re-install the front cover where I hear an occasional backfire noise, but the roll out switch did not trip in the short time I was there.
Thanks for any help.Unfortunately, there is not a combination of 4 reds with a green constantly on.
The board goes through a Bacnet MSTP translator and is mapped into a Metasys front end. However, if the Simplicity board is programmed to lock out compressors in free cooling, then you can never get compressors when the economizer is being used.
Y1 calls for cooling and goes back thru the economizer control.
The display will show a value of –40.0° F.This alarm will have no effect on the operation of the unit.
There is 24volts at Y-out and Econ at the board.
The input to the control originates at terminal FSI, wire 388.what is means error 09 york duct split unit thank youI have a problem with the roof top device ARH-075-AB, code S661752173.Thanks for helping me on error code 42… duct static pressure.. first tech said he changed the filters..
With no flash code on the ignition control, somewhere between the heating section and the board you’ve lost connection or powerS# NON9426154 Mod# PC120C000A2AAA1A.. Compressors , Cond Fan and air handler, continues to run when there is no call for cool or heat. At YORK®, comfort is more than a feeling – it's a promise: to innovate, to assure and, most of all, to deliver.
What other lights are lit on the board?Fill in your details below or click an icon to log in:Enter your email address to subscribe to this blog and receive notifications of new posts by email.which is the factory default on units that ship without economizers
I have a 208 volt feed transformer is wired for 208 and is putting out 24 volts to r and passing through t stat with 24 volts .
Large horsepower motors do not have internal overloads so they are part of the blower contractor.
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