12
Common Problems and Potential Solution
Problem
Possible Causes
Possible Solutions
Model 800 cannot pull
automobile 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 depressor.
•
Tighten or replace hoses on unit.
•
Find and repair leak in A/C system.
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. Replace
Schrader core.
•
Open valve.
•
Recover, check scale calibration, and recharge
system.
Refrigerant not being
transferred 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 responding, call
Technical Support.
•
Call Technical Support.
•
Call Technical Support.
•
Call Technical Support.
Fan not running in any
cycle
•
Loose power wire to fan.
•
Microprocessor malfunction.
•
Fan malfunction.
•
Locate loose fitting and reconnect.
•
Call Technical Support.
•
Call Technical Support.
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 immediately
trips, do not reset. Consult a qualified electrician.
•
Call Technical Support.
•
Repair loose wire.
•
Call Technical Support.
Unit will not recover
refrigerant 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 Support.
Unit will not charge
refrigerant 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 Support.
Refrigerant leaking
during charging
•
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 depressor
•
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.
