13
LCD Error Messages and Potential Solution
Error
Possible Causes
Possible Solutions
Hi Pressure Limit
•
Service valves on hoses closed
•
Open valves
•
Schrader core on A/C system not depressing
•
Replace Schrader core
Tank Empty
•
No refrigerant in storage tank
•
Refill storage tank using Mode 6, Tank Refill
•
Tank not properly on scale
•
Reposition scale
•
Scale cord not properly connected
•
Check scale cord connection
•
Scale is out of calibration
•
Re-calibrate scale using Utility Mode
Supply Tank Empty
•
Tank of new refrigerant is empty
•
Close supply tank valve and disconnect hoses. If
tank is not empty, see “Refrigerant not being trans-
ferred during Tank Refill.”
Tank Full
•
Tank is 80% full
•
Charge some refrigerant or transfer to another tank.
•
Scale is out of calibration
•
Re-calibrate scale using Utility Mode
•
Tank not properly on scale
•
Reposition tank
Time Limit (during
charging cycles)
•
Tank on unit is closed
•
Default time limit is too short
•
Open tank valve
•
Use default time of 10 minutes unless A/C system
•
Compressor not running
•
Call Technical Services
•
Tank or scale misaligned
•
Reposition tank and scale
Time Limit (during
recovery cycle)
•
A/C system has a leak
•
Locate and repair leak
•
Valves on service hoses shut
•
Open valves
•
Service hose is constricted
•
Straighten hose
•
Unit storage tank valve is closed
•
Open tank valves
•
Compressor not operating
•
Call Technical Services
No Scale
•
Scale cord not connected
•
Properly connect cord
•
Scale cord damaged
•
Call Technical Services
•
Microprocessor malfunction
•
Call Technical Services
No Tank
•
Tank is not on scale
•
Place tank on scale
•
Scale out of calibration
•
Calibrate scale using Utility Mode
Possible Overcharge
•
Tank was disturbed during charging cycle
•
Re-start Full Cycle
•
Internal failure of unit
•
Call Technical Services
Accum Time Limit
•
Internal failure of unit
•
Call Technical Services
Accum Hi Pressure
•
Internal failure of unit
•
Call Technical Services
Purge “Y”
•
Non-condensable gases are present in
storage tank
•
Turn unit off and on to start purge cycle
Purge “N”
•
Non-condensable gases are NOT present in
storage tank
•
Normal condition
Purge “E”
•
Time limit was reached before purge cycle
was complete.
•
Turn unit off/on to start purge cycle. If “E” remains
after three on-off cycles, contact Technical Support.
