15
Common Problems and Potential Solution
Problem Possible Causes Possible Solutions
Model 830 cannot pull auto-
mobile A/C system into a
vacuum
• Service valves on hoses not properly
installed on A/C system.
• Service ball valve seals are worn.
• Hoses on unit are loose or leak.
• Automobile A/C system has a leak.
• Check valve seals and threads and replace if
needed.
• Replace valve seals and schrader core depres-
sor.
• Tighten or replace hoses on unit.
High side gauge readings
above normal
• Restriction in A/C system or schrader
core.
• Service hose ball valve closed.
• Incorrect charge amount entered in unit.
• Check hose connection and fix restriction. Re-
place schrader core.
• Open valve.
• Recover, check scale calibration, and recharge
system.
Refrigerant not being trans-
ferred during Tank Refill.
• Valve on supply tank closed.
• Ball valve on blue service hose closed
or hose is constricted.
• Wrong hose installed on new refrigerant
tank.
• Storage tank is full.
• Open Valve.
• Open valve or straighten hose.
• Install blue service hose on refrigerant tank.
• Close valve on new supply. Disconnect service
hose.
Touch Pad will not accept
commands
• Button on touch pad is stuck.
• Bad Touch Pad.
• Wire disconnected between touch pad
and microprocessor.
• Microprocessor malfunction.
• Feel for non-responsive button. If not respond-
ing, call Technical Services.
• Call Technical Services.
• Call Technical Services.
• Call Technical Services.
Fan not running in any cycle
• Loose power wire to fan.
• Microprocessor malfunction.
• Fan malfunction.
• Locate loose fitting and reconnect.
• Call Technical Services.
• Call Technical Services.
Machine will not turn on
• Power cord is not plugged into a 120
Volt outlet.
• Circuit breaker tripped on shop power
panel.
• Bad Main Power switch.
• Loose wire.
• Bad Transformer on microprocessor
board.
• Plug into outlet.
• Reset circuit breaker. If circuit breaker immedi-
ately trips, do not reset. Consult a qualified
electrician.
• Call Technical Services.
• Repair loose wire.
• Call Technical Services.
Unit will not recover refriger-
ant from A/C system
• Valves on service hoses shut.
• Service hose is constricted.
• Unit storage tank valve is closed.
• Open valves.
• Straighten hose.
• Open tank valves.
• Compressor not operating. • Call Technical Services.
Unit will not charge refriger-
ant into vehicle
• Valves on service hoses shut
• Service hose is constricted
• Unit storage tank valve is closed
• Open valves
• Straighten hose
• Open tank valves
• Compressor not operating • Call Technical Services
Refrigerant leaking during
charge operations
• Service valves on hoses not properly
installed on A/C system.
• Check valve seals and threads and replace if
needed.
• Service ball valve seals are worn.
• Replace valve seals and schrader core de-
• Hoses on unit are loose or leak. • Tighten or replace hoses on unit
• Automobile A/C system has a leak • Find leak in A/C system and repair.
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