Robinair 178012K Recovery, Recycling, Recharging Unit - Manual (Page 43)

Model 178002K/178012K Recovery/Recycling/Recharging Unit 41
Troubleshooting
Problem: Tank valves are closed
Solution: Open both valves and be sure hoses are properly
connected to the tank and the unit
EVACUATION OPERATION
Vacuum pump will not start
Problem: Vacuum pump is unplugged from unit
Solution: Plug the pump into a power source
Problem: Power cord is not plugged in or there is no power at plug
Solution: Check circuit for power
Problem: The pressure in the A/C-R system is too high
Solution: Recover the remaining A/C-R system charge
Problem: “U-HI” message on digital display
Solution: Recover all refrigerant before pulling a vacuum
Problem: Vacuum time not entered
Solution: Program the required time for vacuum
Vacuum pump runs but low side gauge does not register an
appropriate vacuum
Problem: Low side valve is closed
Solution: Open the low side valve
Problem: Pump oil is contaminated
Solution: Flush and change the vacuum pump oil
Problem: Hose connection is loose or manifold is leaking
Solution: Check connections
CLEARING OPERATION
“CLR” displays on screen
Problem: Pressing HOLD/CONT does not clear the display
Solution: 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)