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M-SV-001-EN Rev.E
Compressor Components
3.12.3.2 Output Voltage
to Solenoids
3.12.3.3 Cooling Path
Blockage Inspection
3.12.4 Removal and
Installation
3.12.4.1 Solenoid
Removal
3.12.4.2 Solenoid
Installation
1. Remove the Service Side Cover.
2. To ensure the Serial Driver is providing power
to the solenoids, look for the Cool-L and Cool-H
LEDs on the Backplane. See Figure 60 (Backplane
Connections and Test Points).
3. When the solenoids are energized, measure
the +24V test point on the Backplane to verify
the Serial Driver is providing power to the motor
cooling solenoids.
1. Isolate compressor power.
2. Isolate the compressor; recover the refrigerant
according to industry standards.
3. Remove the actuators, solenoids and orifice.
4. Ensure that the cooling paths are clean, as
shown in Figure 66 (Solenoid Cooling Path).
1. Isolate compressor power.
2. Recover the refrigerant from the compressor.
3. Remove the Service Side Cover
4. Disconnect the solenoid actuator coils
connector from the Backplane.
5. Remove the solenoid actuator coils.
6. Remove the solenoid body and cooling valve
orifice.
1. Lubricate a new O-ring with O-ring lubricant
and install it on the valve.
2. Insert the valve orifice and solenoid body in
the opening and engage the first few threads by
hand.
3. Tighten the valve using a socket and driver.
4. Leak test compressor to appropriate pressure
and industry accepted standards.
5. Evacuate compressor to appropriate pressure
and industry accepted standards.
6. Reinstall solenoid actuator coils.
7. Reconnect the solenoid coils to the Backplane.
8. Reinstall Service Side Cover.
9. Reapply power to compressor.
Figure 66 - Solenoid Cooling
Path (TT300/TG230 Shown)
• • • CAUTION • • •
Removal of the compressor solendoids will release refrigerant. Isolation and recovery of the refrigerant must be performed by a
qualified service technician adhering to industry/ASHRAE standards.
NOTE
On current TT350, TT400, TT500, TT700, TG310, TG390, and TG520 models and certain TT300 models, the solenoid valve bodies
may have different orifice sizes due to the split-cooling configuration. It is important to not get the left and right confused when
removing and installing these solenoid bodies. See Figure 64 (Motor Cooling Solenoid Actuators).
Cooling Path
Summary of Contents for Turbocor TT-300
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