Replacing an Electric Heater

Procedure

1. Tap Shutdown on the home screen of the display module. Turn off the active power switch QF1, standby power switch QF2 (you do not need to turn off QF2 for the model with a single power supply), and drive switch QF3.

   Exercise caution because the device is still energized after it is shut down on the home screen of the display module.

2. Open the front door, disconnect the fan terminals, and remove the fan support.
   Figure 11-45 Removing a fan support
   

3. Cut the cable ties that secure the electric heater terminal and remove the terminals.
4. Unscrew the four screws on the single electric heater, as shown in Figure 11-46.
   Figure 11-46 Removing an electric heater
   

5. Install the new electric heater in the reverse order of the removal.
   Figure 11-47 Installing a new electric heater
   

6. Install the fan support and connect the terminals.
   Figure 11-48 Installing a fan support
   

   Install the fan support by following the consequence on the label of fan support, to avoid reverse installation.

7. Power on the device and choose Maint > Diagnostic Mode > Enter on the home screen. Manually start the electric heater, and check that the electric heater works properly. Then exit from the diagnostic mode.
8. Power on the device, choose Maint > Performance Maint on the home screen of the display module to access the performance maintenance screen, and clear the runtime of the electric heater.
   Figure 11-49 Performance maintenance
   

9. Tap Start on the home screen. Ensure that the smart cooling product is running normally without any alarms.