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Reads high pressure unit dissabled - Robinair Cool Tech 34700Z Recovery, Recycling, Recharging

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This is a common problrm of Robinair 34700Z / 347002k & 347112k series don't worry just do the following :- 1# Verify the ISV tank is not overfilled.if full,remove refrigerant manually from tank. 2# Verify if there is high pressure in the tank.Purge excess air from the tank manually.( Open air purge hose from the tank,then press tank valve as needed) 3#Check the high pressure switch for proper operation,if not then replace high pressure switch.Hope this will solve your problem

Posted on Feb 12, 2010


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I just put new Energizer batteries in both the outdoor and indoor units. Followed directions. The receiver is displaying HH when I ask for the high.

Very likely you have high pressure in your area. HHH means that the pressure is higher than the unit can read. Check local barometer readings to confirm.

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Oil pressure gauge reading between half to three-quarters too high it doesn't go too low pressure just read hi anywhere between half to a very high

replace the oil pressure sender unit ( not the pressure sensor unit) as it appears to be faulty and stuck giving the wrong reading.

Jan 25, 2015 | Cars & Trucks

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High oil pressure reading on a 2005 nissan aramada

You may have a defective oil pressure sending unit on the engine or the oil pump relief spring may be sticking. Have the oil pressure tested with a special tool that goes in the oil port the sender is screwed into to determine the cause of the high pressure.;

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I just noticed that my oil pressure gauge reads high. Any ideas? 2002 grand cherokee 4.0

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Where is the oil pressure sensor located on a 1996 murcury cougar

Look for the oil pressure sending unit on the block or the cylinder head on the V-6 or V-8 models. --- OIL PRESSURE TEST Check for proper oil pressure at the sending unit passage with an externally mounted mechanical oil pressure gauge (as opposed to relying on a factory installed dash-mounted gauge). A tachometer may also be needed, as some specifications may require running the engine at a specific rpm.
  1. With the engine cold, locate and remove the oil pressure sending unit.
  2. Following the manufacturer's instructions, connect a mechanical oil pressure gauge and, if necessary, a tachometer to the engine.
  3. Start the engine and allow it to idle.
  4. Check the oil pressure reading when cold and record the number. You may need to run the engine at a specified rpm, so check the specifications.
  5. Run the engine until normal operating temperature is reached (upper radiator hose will feel warm).
  6. Check the oil pressure reading again with the engine hot and record the number. Turn the engine OFF.
  7. Compare your hot oil pressure reading to specification. If the reading is low, check the cold pressure reading against the chart. If the cold pressure is well above the specification, and the hot reading was lower than the specification, you may have the wrong viscosity oil in the engine. Change the oil, making sure to use the proper grade and quantity, then repeat the test. Low oil pressure readings could be attributed to internal component wear, pump related problems, a low oil level, or oil viscosity that is too low. High oil pressure readings could be caused by an overfilled crankcase, too high of an oil viscosity or a faulty pressure relief valve.

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1 Answer

How do i hook my manifold gauges to my residental condensing unit to check pressures

The AC manifold gauges set have the three chambers: the low pressure chamber (left side), utility chamber (middle), and the high pressure chamber (right side).

When technicians connect the HVAC manifold gauge to the air conditioner units, he connects the low pressure side of air conditioner unit to low pressure gauge side.

If he wants to read the pressure in discharge line he connects the high pressure gauge hose to the air conditioner high pressure side.

The utility port (the middle chamber) is a place you connect the hose to vacuum pump, recovery units or add or remove refrigerant from AC units.

Air conditioning gauges is used to measure air conditioner units pressure within closed-system to evaluate or troubleshoot the AC units. Gauges manifold set is the most frequently used item when it comes to refrigerant or pressure.

Air conditioning gauge set allows the HVAC technician to check AC units operating pressures, transfer AC refrigerant, pressure test system, purge the system with nitrogen, and perform other necessary tasks.

The gauges manifold set includes the hoses, the manifold, the valves, the compound gauge (low pressure gauges) and high pressure gauge.

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1 Answer

What should the high pressure line read to be fully charged on my RUUD UAKA-042 a/c unit? The specs on the unit has a design pressure of 300 PSI on the high pressure line and 150 PSI on the low pressure...

that is a desing pressure not an operation pressure. opperating pressuers will vary with load so pressure alone will not tell you if you have the proper charge. the proper method is with superheat or subcooling, depending on the type of metering device you have

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1 Answer

Guage reading high

It is not hard to change the sending unit. I reccomend that you remove the sending unit and hook up a test gauge, then you will know if your pressure is actually too high, or not.

Sep 20, 2009 | 1991 Chevrolet S-10 Blazer

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1993 Jeep Grand Cherokee, V6. Oil Pressure Gauge Read High.

it could be the sensor you should look at the oil pressure relief valve

Jun 10, 2009 | 1994 Jeep Cherokee

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