Thermo King T-1080S, Руководство по обслуживанию

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Refrigeration Service Procedures
152
Removal
1. Recover the refrigerant charge.
2. Place a heat sink on the check valve.
3. Unsolder the refrigeration lines and remove
the check valve.
Installation
NOTE: A heat sink must be used on the in-line
check valve when it is being soldered in place to
prevent damage to the neoprene seal.
1. Clean the tubes for soldering.
2. Place the check valve in position. The arrow
on the valve body indicates the direction of
refrigerant flow through the valve.
3. Place a heat sink on the check valve.
4. Solder the inlet and outlet connections.
5. Pressurize the refrigeration system and test for
leaks.
6. If no leaks are found, replace the liquid line
drier then evacuate the system.
7. Recharge the unit with proper refrigerant and
check the compressor oil.
Liquid Injection Solenoid (LIS)
Test
1. Attach a gauge manifold to the suction service
valve and the discharge service port. A low
loss fitting must be used on the hose
connected to the discharge service port.
2. Run the unit in low speed cool until the
system pressures stabilize.
3. Front seat the suction service valve and allow
the compressor to pump down to 0 to 5 in. Hg
vacuum (0 to -17 kPa).
4. Turn the unit Off.
5. Monitor the suction pressure. It will rise very
slowly as the discharge pressure leaks back
through the discharge device into the
compressor. If the suction pressure is rising
steadily, the LIS might be leaking.
6. Check the temperatures of the refrigeration
lines on each side of the LIS by hand. A
temperature difference between the two sides
of the LIS indicates it is leaking.
7. Use the Mechanics/Premium HMI Control
Panel to enter the Interface Board Test Mode.
Refer to the appropriate Microprocessor
Diagnostic Manual for specific information
about the Interface Board Test Mode.
8. From the Interface Board Test Mode select
Liquid Injection Valve.
9. Momentarily (for approximately 1 second)
energize the LIS with the Interface Board Test
Mode. The suction pressure should rise
slightly. If the suction pressure does not rise,
the LIS is not opening. Check the continuity
of the wiring and the solenoid coil before
assuming the solenoid is faulty.
10. Back seat the suction service valve and
perform a “Refrigerant Gauge Removal”
procedure.
Liquid Injection Solenoid (LIS)
Replacement
Removal
1. Recover the refrigerant charge.
2. Unsolder the inlet/outlet lines from the liquid
injection solenoid.
1. Valve 3. Valve Seat
2. Neoprene Seal 4. Spring
Figure 242: Cross Section of In-line Check Valve
AEA648
CAUTION: Do not run scroll compressor
in a vacuum for more than 1 minute.