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Introduction MAC2000
1.1 Glossary of Terms
A/C Air conditioner or air conditioning
A/C System The vehicle’s air conditioning system
Unit The MAC2000 itself
Screen LCD Display
Contaminated Refrigerant that has been mixed with some
other type of refrigerant.
1.2 General Operating Guidelines
• The MAC2000 monitors the AC line voltage and disables itself if
the voltage drops below 100 VAC or rises above 135 VAC. An error
message will be displayed on screen when the line voltage is out of
tolerance. The unit must be turned OFF and then back ON to reset
the voltage monitoring circuitry. Extension cords must be a
minimum of 14 AWG and kept as short as possible.
Common causes for electrical problems include:
- Long extension cords
- Faulty, overloaded electrical circuits
- Drop lights
- Improper ground or improper polarity
• The screen shows options and gives instructions for most service
and maintenance tasks. Read the on-screen prompts and follow
their instructions.
• The MAC2000 prompts a technician to check the system oil drain
bottle on the side of the unit for recovered oil. Any system oil that is
lost is automatically drained during recovery. A technician must
measure and record the lost amount of oil in order to know how
much new oil to add during charging. Refer to the A/C system
manufacturer’s service manuals for oil specifications. Dispose of
used oil properly.
• In general, it is best to leave the MAC2000 turned ON throughout
the workday. This allows the unit time to purge itself of air and
refill the internal storage tank. Turn the unit OFF at the end of the
day.
Instruction 2072-0400 2