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17800a

Choose from the following issues to view the related trouble shooting tips.

1. Compressor does not start.

2. Runs for a short time but doens not complete recovery.

3. Runs but will not shut off.

4. Compressor does not start or stops prematurely.

5. Refrigerant does not flow.

6. No power when MAIN POWER switch is on - no display showing.

7. Audible tone sounds during refrigerant transfer.

8. Vacuum pump will not start.

9. Vacuum pump runs but low side gauge does not register an appropriate vacuum.

10. "CLR" displays on screen.

1. Compressor does not start

 

Main power switch is off

 

Turn on switch
   

 

Power cord is not plugged in or there is no power at plug.

 

Check circuit for power
   

 

FULL message on digital display

 

Change tanks. (see Installing a Tank and Pulling a Vacuum).
   

 

HI-P message on digital display

 

Be sure tank valves are open and hoses are properly connected to the tank or check for air in the tank (recycle tank to purge any air), or check the scale calibration (see Checking the Scale Accuracy).
   

 

CH-F message on digital display

 

Remove and replace the filter-drier. See REPLACING THE FILTER-DRIER and be sure to pull a vacuum before continuing

2. Runs for a short time but does not complete recovery

 

Tank valves are closed

 

Open both valves and be sure hoses are properly connected to the tank.
   

 

Manifold valves are closed

 

Open both valves

3. Runs but will not shut off.

 

Oil drain valve is open.

 

Close the oil drain valve.
   

 

There is a leak in the A/C-R system

 

Locate and repair all system leaks
   

 

Hoses are not properly connected to the vehicle

 

Check hose connections
   

 

Oil return solenoid is open

 

Replace the oil return solenoid

RECYCLING OPERATION

4. Compressor does not start or stops prematurely

 

Power cord is not plugged in or there is no power at plug

 

Check circuit for power
   

 

Tank valves are closed

 

Open both valves and be sure hoses are properly connected to the tank
   

 

"CH-F" message on digital display

 

Remove and replace the filter-drier (see Replacing the Filter-Drier), and be sure to pull a vacuum before continuing

5. Refrigerant does not flow

 

Refrigerant supply empty or low

 

Add refrigerant to the tank
   

 

Tank valves are closed

 

Open both valves and be sure hoses are properly connected to the tank and the unit

RECHARGING OPERATION

6. No power when MAIN POWER switch is on - no display showing

 

Power cord is not plugged in or there is no power at plug

 

Check circuit for power
   

 

The "CHECK REFRIGERANT" message is displayed

 

There is less than 6 pounds of refrigerant in the tank; add refrigerant to the tank in the tank; add refrigerant to the tank

7. Audible tone sounds during refrigerant transfer

 

Transfer stopped or too slow

 

Close the high side valve, then start the A/C-R system and pull the remaining refrigerant into the system
   

 

Refrigerant supply is low or empty

 

Add refrigerant to the tank or change tanks
   

 

Tank valves are closed

 

Open both valves and be sure hoses are properly connected to the tank and the unit

EVACUATION OPERATION

8. Vacuum pump will not start

 

Vacuum pump is unplugged from unit

 

Plug the pump into a power source
   

 

Power cord is not plugged in or there is no power at plug

 

Check circuit for power
   

 

The pressure in the A/C-R system is too high

 

Recover the remaining A/C-R system charge
   

 

"U-HI" message on digital display

 

Recover all refrigerant before pulling a vacuum
   

 

Vacuum time not entered

 

Program the required time for vacuum

9. Vacuum pump runs but low side gauge does not register an appropriate vacuum

 

Low side valve is closed

 

Open the low side valve
   

 

Pump oil is contaminated

 

Flush and change the vacuum pump oil
   

 

Hose connection is loose or manifold is leaking

 

Check connections

CLEARING OPERATION

10. "CLR" displays on screen

 

Pressing HOLD/CONT does not clear the display

 

Slide the lockout panel on the back of the unit to expose the fittings for the correct refrigerant type, connect the appropriate hoses and perform a clearing procedure (see Step 12 in Set Up Instructions)

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Customer Service:  800-628-6496  /  Technical Service: 800-822-5561

Robinair   /  SPX Corporation  /  655 Eisenhower Drive  /  Owatonna, MN 55060

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