Maintenance - Compressor Oil Change; Troubleshooting Guide - PREVOST H3-41 Maintenance Manual

SECTION 22: HEATING AND AIR CONDITIONING
4.1.5

Maintenance - Compressor Oil Change

Impurities from the system components or
operation outside the application ranges can
lead to deposits in the lubrication oil and darken
its color. Change the oil in this case. At the
same time, clean the oil filter and magnetic plug
as well. Determine and eliminate the cause for
operation outside the application ranges.
Compressor oil change
Change the oil, clean the compressor oil filter
and the magnetic plug at the intervals specified
by the Lubrication And Servicing Schedule in
Section 24: LUBRICATION & SERVICING.
Oil Type: Polyolester ISO68.
• Bitzer BSE55 (POE)
Castrol Icematic SW 68
•
Mobil EAL Arctic 68
•
Shell S4 FR-F 68, Clavus R68
•
• Check the oil level first, according to
"Maintenance - Oil Color & Level Check".
• Connect the refrigerant recovery station to
the service connections of the shut-off
valves.
• Isolate the compressor from the system. To
do so, frontseat the compressor shutoff
valves.
• Extract the refrigerant using the recovery
station until ambient pressure is reached.
Take note of the quantity removed.
• Remove the magnetic drain plug.
28 PA1621 Maintenance Manual All Series | Revised February 2019
FIGURE 35: OIL FILL PLUG (A) AND SIGHT GLASS (B)
• Drain the oil into a container. Measure the
quantity of oil removed.
• Extract and clean the oil filter/strainer.
Reinstall once done.
FIGURE 36: CUTAWAY
FILTER/STRAINER AND MAGNETIC DRAIN PLUG
• Clean the magnetic drain plug and reinstall.
• Through the oil filling port, add the same
amount of fresh oil. More oil should be added
if the oil level was too low when checked at
the beginning.
• Evacuate the compressor to 500 microns.
• Charge the system with new refrigerant.
Charge with the same quantity as recovered
previously.
4.1.6

Troubleshooting Guide

A preliminary check may be made by simply
feeling the cylinder heads with the unit in
operation at ambient temperatures of 35
and over. The cylinder heads are internally
VIEW SHOWING OIL
F (2 C)
o o