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Replacing a Pressure Switch or Pressure Sensor
The procedure for replacing a high pressure sensor or low pressure sensor is similar to that of replacing a high pressure switch. The following describes how to replace a high pressure switch.
Prerequisites
- A high pressure switch needs to be replaced.
- A spare high pressure switch of the same model is available and functional.
- Tools: gloves, two adjustable wrenches, thread sealant
Procedure
- Tap Shutdown on the home screen of the display module and turn off the smart cooling product switch in the upstream PDF.
Exercise caution because the device is still energized after it is shut down on the home screen of the display module.
- Open the rear door and remove the air filter.
- Remove the cables from the high pressure switch.Figure 11-9 Position of the high pressure switch
- Secure the pipe nut using an adjustable wrench, and loosen the adjustable nut using another adjustable wrench until the high pressure switch is removed.Figure 11-10 Removing a high pressure switch
(1) Pipe nut
(2) Adjustable nut
Exercise caution when removing the high pressure switch because a small amount of refrigerant will be sprayed when you remove the switch.
- Apply sealant on the outer side of the air valve connected to the pipe nut.
- Install the new high pressure switch and connect cables.
- Install the air filter and close the rear door.
- Power on the device and tap Start on the home screen. Ensure that the smart cooling product is running normally without any alarms.
