This task covers:
Shop Equipment, Automotive Maintenance and
Power shut off, power panel and rear control panel
Tool Kit, Service: R22 Refrigeration Unit
ECU doors and covers opened or removed as
ECU work platform installed (reference
The R22 refrigerant system is pressurized. To prevent injury to personnel, gloves and eye
protection must be worn when working on R22 refrigerant system.
Prevent contact of R22 refrigerant with flame or hot surface. Heat causes R22 refrigerant to
break down and form carbonyl chloride (phosgene), a highly toxic and corrosive gas.
R22 refrigerant must be recovered. Venting R22 refrigerant into the atmosphere is a
violation of public law and subject to severe penalties.
Do not attempt to remove or connect refrigerant servicing equipment while ECV is running.
Failure to observe these warnings can result in injury to personnel.
Cover or plug openings immediately after removing line to prevent contamination. Remove
and replace tape as required.
Flow nitrogen through tube assembly when brazing or unbrazing to prevent damage to
This procedure covers the replacement of the accumulator, suction line vibration absorber
and low pressure switch LPS1.
Remove/disassemble only to the extent necessary to remove or replace defective
assemblies/components. Use standard maintenance shop practices/procedures.
Remove insulation on accumulator tube assembly (1), vibration absorber (2) and accumulator (3)
to gain access to fittings.
Remove cable assembly 1A4A1W3 connector P4 (4) from low pressure cutoff switch LPS1 (5) on
accumulator tube assembly (1).