Robinair 342000 Refrigerant Service Solution - Manual (Page 5)

3
342000 Refrigerant Service Solution
Introduction
GENERAL OPERATING GUIDELINES
Use the following guidelines when operating the 342000:
1. The voltage at the unit must be
±10% of the unit’s rated voltage. Errors
will be displayed on the screen. Extension cords must be a minimum of 14
AWG and kept as short as possible. Common causes for electrical prob-
lems include:
• Long extension cords
• Faulty, overloaded electrical circuits
• Drop lights
• Imcorrect ground or polarity
NOTE: If your electrical circuits have reversed polarity, the screen dis-
plays the following messages:
VOLTAGE LINE ERROR
CHECK POLARITY
VOLTAGE READOUT WILL BE DISABLED
with an option to continue.
NOTE: If you choose the CONTINUE option, the over- and under-voltage
protection built into the circuit board will be disabled. The unit may not
operate correctly. To ensure correct operation, you must use a circuit with
the correct polarity.
2. The display shows options and gives instructions for most service mainte-
nance tasks. Read the display prompts and follow the directions given
there.
3. To interrupt any function, press the PAUSE key, then press the
CONTINUE key to restart the procedure.
4. The 342000 prompts you to check the system oil drain bottle on the back of
the unit for recovered oil. Any system oil that is lost will automatically drain
during recovery. You must measure and record the lost amount so that you
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
according to local, state, and federal regulations.
5. In general, it is best to leave the 342000 main power ON throughout the
workday. This allows plenty of time for the unit to purge air from the tank and
refill the internal storage vessel. Turn the unit OFF at the end of the day.
I MPORTANT OPERATING NOTES
• Change the filter-drier when the display shows the CHANGE FILTER mes-
sage. Follow the instructions for the changeover.
• At temperatures exceeding 120 o F / 49 o C, wait 10 minutes between recovery
jobs.