How do you test a trinary switch?
On diesels, you can trip the high speed fan by shorting the yellow/grey and black wires in the trinary plug. Just pull off the plug and short them with a wire and turn on the ignition. The fan should start in a few seconds. I’d expect all fans to pass this test because the high speed circuit is almost never a problem.
Can you bypass a trinary switch?
But some have a binary or trinary switch which is supposed to protect against high and low pressures, but really doesn’t do a good job on the low side. In your case, if your system is working properly, you should be able to bypass the switch temporarily until you can replace it.
What does AC trinary switch do?
A “low pressure switch” disengages the compressor clutch if there is excessive refrigerant loss (below 30 PSI). A “Trinary Switch” incorporates both high and low pressure cutoffs, plus adds an “electric fan engagement signal” (at 254 PSI) feature to help bring internal temperatures down.
What is a AC binary switch?
Description. Binary pressure switches provide a simple and effective option for AC system pressure control. The pressure switch typically disconnects power supply to the compressor clutch to protect the compressor during abnormally high system pressure conditions and abnormally low system pressure conditions.
How much freon does a vintage air system hold?
Vintage Air’s standard charge recommendation is 1.8 lbs (28 oz) of 134A refrigerant. This charge will be correct for most standard installations (dash-mounted systems), but some additional refrigerant will be required for a trunk-mounted system with a liquid line of more than 12 ft.
What are trinary switches on four seasons air conditioner?
Trinary Switches. Trinary switches provide compressor protection against high side pressures that are too. high or too low. These switches can also engage a fan clutch or open radiator shutters. Other multi-pressure controls could be utilized. Four Seasons’ trinary switch part numbers are 35889 and 35901.
What is the part number for a trinary switch?
If the original trinary switch terminals are different, a four wire boot connector (part number 35900) can be used. Terminal 1 – black wire (to compressor clutch) Terminal 2 – black wire with white stripe (to AC thermostat) Terminal 3 – yellow wire (to fan clutch or Shutters) Terminal 4 – orange or red wire (to power) 35901 35889
Where are the low and high AC pressure switches located?
The low-pressure side switch is found before the AC compressor, while the high-pressure switch comes after the compressor. Most AC pressure switches are found within the engine compartment, but some manufacturers put them elsewhere. A look in your service manual will show you the appropriate location for your model. AC Pressure Switch Function