Lincoln Navigator: Climate Control System - General Information / Refrigerant Identification Testing. General Procedures
Activation
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NOTE:
Use Refrigerant Identification Equipment to identify
gas samples taken directly from the refrigeration system or storage
containers prior to recovering or charging the refrigerant system.
NOTE:
Use Refrigerant Identification Equipment that
conforms to SAE J1771 standard for R-134a or SAE J2912 standard
identifies R-134a and R-1234yf.
Follow the instructions included with Refrigerant
Identification Equipment to obtain the sample for testing. For the
correct Refrigerant Analyzer,
Refer to: Climate Control Tools and Equipment (412-00 Climate Control System - General Information, General Procedures).
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NOTE:
The refrigerant identifier displays one of the following:
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If the purity level of R-134a or R-1234yf is 98% or greater by weight,
the green PASS LED . The weight concentrations of R-1234yf, R-134a,
R-12, R-22, hydrocarbons and air will be displayed on the digital
display.
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If refrigerant R-134a or R-1234yf does not meet the 98% purity level, the red FAIL LED
and an alarm sounds alerting the user of potential hazards. The weight
concentrations of R-1234yf, R-134a, R-12, R-22 and hydrocarbons will be
displayed on the digital display.
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If hydrocarbon concentrations are 2% or greater by weight, the red FAIL LED
, "Hydrocarbon High" will be displayed on the digital display, and an
alarm will sound alerting the user of potential hazards. The weight
concentrations of R-1234yf, R-134a, R-12, R-22 and hydrocarbons will
also be displayed on the digital display.
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The percentage of air contained in the sample will be
displayed if the R-134a or R-1234yf content is 98% or greater. The
refrigerant identifier eliminates the effect of air when determining the
refrigerant sample content because air is not considered a contaminant,
although air can affect A/C
system performance. When the refrigerant identifier has determined that a
refrigerant source is pure (R-134a or R-1234yf is 98% or greater by
weight) and air concentration levels are 2% or greater by weight, it
will prompt the user if an air purge is desired.
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If contaminated refrigerant is detected, repeat the
refrigerant identification test to verify the refrigerant is indeed
contaminated.
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NOTICE:
If contaminated refrigerant is detected, DO NOT
recover the refrigerant into R-134a or R-1234yf recovery/recycling
equipment. Recovery of contaminated refrigerant contaminates the
recovered refrigerant supply and may damage the recovery/recycling
equipment.
NOTE:
Install a new suction accumulator or receiver drier or receiver drier element as directed by the A/C system flushing procedure.
Recover the contaminated refrigerant using suitable
recovery-only equipment designed for capturing and storing contaminated
refrigerant only.
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Determine and correct the cause of the customer's initial concern.
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Follow the A/C System Flushing procedure,
Refer to: Air Conditioning (A/C) System Flushing (412-00 Climate Control System - General Information, General Procedures).
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Dispose of the contaminated refrigerant in accordance with all federal, state and local regulations.
Inspection
NOTE:
A coolant leak in the heater hose could follow the
heater core tube to the heater core and appear as a leak in the heater
core...
Filling
Refer to the Refrigerant Oil Adding (when new components
are installed) chart below for refrigerant oil adding amounts and
methods of installation...
Other information:
Special Tool(s) /
General Equipment
211-023
(T74P-3044-A1)
C-Frame and Screw
Removal
NOTICE:
Suspension fasteners are critical parts that affect the
performance of vital components and systems. Failure of these fasteners
may result in major service expense...
Electric Brake Boost
Overview
The power assisted brake system utilizes an EBB . The EBB is an
integrated function of the ABS / HCU assembly and is controlled by the
ABS module. The ABS / HCU combines the functions of a conventional
vacuum booster and ABS module...