1. AR2700, AR2788, AR2788S, FA1000, FA1234

Problem and Solution

Unit Will Not Power Up

Turn the power switch on. The unit LCD will displayrevision program and filter life within 3 to 5 seconds after turning on unit.

If this process does not happen then see the trouble shooting tips below.

  1. Check power cord is firmly plugged into unit all the way.
  2. Check Circuit breaker on unit. Check that it is not tripped.
  3. Check power source to unit. Check with voltage meter. (The fan will run as soon as you plug it in on the following unit listed by serial number.)
  1. AR2700 Serial Numbers Beyond to 03/13 AR00764
  2. AR2788 None
  3. AR2788S Serial Numbers Beyond to 10/12 AR001844
  4. FA1000 All
  5. FA1234 All
  1. Check for LED light on main PCB is powered up. Open top panel to see lights on Main PCB.
  2. Check power to the power supply PCB (120 volts AC in) and power from the (PCB 12 volts DC out).
  3. Check Contrast on PCB for adjustment.
  4. Unit passes the above checklist. The LCD or Main PCB maybe bad.
  1. If the LCD is bad and main PCB is good. The unit will go through PT setup, but no display on screen.
  2. If the LCD is good even there is no display showing and Main PCB is bad. The unit will not run through PT setup.

Unit Stuck In PT Calibration Mode

Turn the power switch on. The unit LCD will displayrevision program and filter life within 3 to 5 seconds after turning on unit. Then the Please wait PTCAL with display a second or two after filter life. During the PT CAL the recovery compressor will run first until PT is satisfied. After compressor turns then 40 seconds later the vacuum pump will run for 4 seconds and turn off. The unit will then look to see if air purge is needed. If no air purge is needed then the unit displays Main Menu. This process from turning unit on to main menu display is 90 seconds. Note: If the unit needs to purge then process will take longer than the 90 seconds. Additional 5 minutes is possible depending on pressure in recovery tank being purged.

If the above process does not happen then see trouble shooting tips below.

  1. Check oil injection bottle assembly.
  1. Oil Injection bottle is tight to the back of the unit.
  2. Check that the oil injection valve is closed. (Earlier unit had flip level.)

2. Check that recovery compressor turns on and then off. Compressor will turn off

once vacuum is satisfied on Pressure Transducer

3. Check that vacuum pump on/off switch is in the on position. (I)

4. Check that the vacuum pump power cord is plugged in firmly both ends.

  1. Check that vacuum pump is good.
  1. Plug vacuum pump directly into power source using main power cord.
  1. Vacuum Pump runs constantly. (Should run for 4 seconds during PT Cal)
  1. Check yellow batch cord on main PCB and Low side block.
  2. Check oil level on vacuum pump. (Vacuum pump over filled won’t pull vacuum.)

7. Check tank pressure and manually purge tank if needed.

  1. Connect red service hose to filter block red cap on top of tank. Open red tank valve, ball valve on hose from liquid tank valve to filter, and red service

8. AR2788 units only manually re calibrate Pressure Transducer.

Unit Stuck In Air Purge

  1. Air Purge has a five minute time limit.
  2. To reset unit press the bottom key button after 5 minutes.
  3. Check tank pressure and manually purge tank if needed.
  4. Connect red service hose to filter block red cap on top of tank. Open red tank valve, ball valve on hose from liquid tank valve to filter, and red service coupler. Tank presser will display on red high side gauge.

4. AR2788 units only manually re calibrate Pressure Transducer.

Oil Drain Bottle Cap Blew Off (Prior to Serial No. Rev. 5.1.8

  1. Check tank valve and tank hose are open.
  2. Check tank pressure and manually purge tank if needed.
  1. Connect red service hose to filter block red cap on top of tank. Open red tank valve, ball valve on hose from liquid tank valve to filter, and red service coupler. Tank presser will display on red high side gauge.

Unit Will Not Inject Oil

  1. Vacuum pump ran for 15 minutes on closed system, and 45 open system.
  2. Check service couplers are open.
  3. Unit gauges are showing a vacuum before open oil injection valve.
  4. Check that oil injection is tight on back of unit.
  5. Unit oil injection bottle has oil in it.
  6. Check valve at the end of the pick up tube in oil injection bottle is stuck.

Unit Will Not Recover Refrigerant

  1. Check for pressure on gauges.
  2. Checks the service couplers are open.
  3. Check tank valve are open.
  4. Check that the compressor is running.
  5. Check tank pressure and manually purge tank if needed.
  6. Connect red service hose to filter block red cap on top of tank. Open red tank valve, ball valve on hose from liquid tank valve to filter, and red service coupler. Tank presser will display on red high side gauge.

6. Manually purge Compressor on suction and discharge port.

Unit Will Not Refill Refrigerant

  1. Check for pressure on Red gauge.
  2. Checks the Red service coupler is open.
  3. Check tank valve are open.
  4. Check that the virgin tank bottle valve is open.
  5. Check that the compressor is running.
  6. Check tank pressure and manually purge tank if needed.
  7. Connect red service hose to filter block red cap on top of tank. Open red tank valve, ball valve on hose from liquid tank valve to filter, and red service coupler. Tank presser will display on red high side gauge.

7. Manually purge Compressor on suction and discharge port.

Unit Will Not Pull Into Vacuum During Recovery

  1. Check the service couplers are tight to service hoses.
  2. Check that the compressor is running.
  3. Check that the oil injection bottle valve is closed and tight to unit.
  4. Check that gauges are calibrated.

a. Remove couplers from service hoses. Gauges should read 0 PSI. If adjustment is needed, then remove plastic plug from plastic lenses and adjust to 0 psi.

  1. Check that the o rings in service couplers are good. Remove couplers from car service ports and recover hoses. If gauge pull down into vacuum o rings need replaced.
  2. Check tank pressure and manually purge tank if needed.

a. Connect red service hose to filter block red cap on top of tank. Open red tank valve, ball valve on hose from liquid tank valve to filter, and red service coupler. Tank presser will display on red high side gauge.

Unit Vacuum Pump Will Not Pull Deep Vacuum

  1. Check the service couplers are tight to service hoses.
  2. Check that vacuum pump is running.
  3. Check that oil level in sight glass is not over filled.
  4. Check that gauges are calibrated.

a. Remove couplers from service hoses. Gauges should read 0 PSI. If adjustment is needed, then remove plastic plug from plastic lenses and adjust to 0 psi.

  1. Check that oil injection bottle valve is closed and tight to unit.
  2. Check o rings in service couplers are good. Remove couplers from car service ports and recover hoses. If gauge pull down into vacuum o rings need replaced.

Unit Will Not Charge

  1. Display stated unit charging, but weight showed the unit did not put any refrigerant in (Hose holds 2 oz). Then the check connection message came up on display after two minutes.
  2. Check that the Red gauge is reading pressure, if so then the Charge solenoid is working. If the Red gauge is still in vacuum need to continue to next step.
  3. Check the valves on the recovery tank and tank hoses ball valves are open.
  4. Check that the service couplers are open.
  5. Check that there is refrigerant available for charging. (4 to5 lbs in tank after charge selected).
  6. Check service couplers for flow restriction.
  7. Check that the solenoid Valve is clicking after starting charge mode. The light next to the LS1 orange connector on low side block PCB should be energized with red light.

a. If red light is on, but solenoid not clicking. Remove connector if it is old style connector orange in color from low side block PCB and push both black wires further down in connector.

Unit Will Not Complete Charge

  1. Display stated unit charging with pressure on gauges, but did not complete the full charge. (Normally at least half the charge was dispensed). Then the check connection message came up on display after two minutes.
  2. Check that there is refrigerant available for charging. (4 to 5 lbs in tank after charge selected).
  3. Vacuum pump ran for 15 minutes on closed system, and 45 minutes on opened system for deep vacuum.
  4. Use low side adaptor to complete charge AR2788, AR2788S. FA unit turn hi side adaptor off, and start car.

E5 Ball Valve Error Message

  1. E5 is motorized ball valve error.
  2. LV in the message indicates low side valve.
  3. HV in the message indicates hi side valve
  4. Number indicated which valve is having trouble.
  1. Check connector on PCB for motorized ball valve location.
  2. The old blue connector only. You can remove connector from PCB and push wire further into connector for better connection.

High Pressure Cut out 450psi

  1. Check tank and hose valves are open.
  2. Check tank pressure.
  3. Check orange high pressure switch wire for connection.

LCD Display Is Dim or Read out

  1. Adjust contrast on main PCB
  2. Unit cannot be in the direct sun light.

Changing Filter

1. Remove filter from tank bracket and turn filter 90 degrees with black block with red and blue caps pointed downwards. It will cut 30 minutes off recovering filter.

2. Close red tank valve off to prevent additional refrigerant into filter.

3. Connect red and blue service hoses to black block on filter.

Air Flow Switch E-15 Error

  1. Check wire connection on main PCB two purple wires. (FA1234 unit only)
  1. Check that the air flow switch assembly has two clear PVC tubes attached properly. (FA1234 unit only)
  1. Jump out two pins on main PCB where flow switch wire connect to confirm wires or flow switch is bad.

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