Hitachi RCI Service Manual page 393

12 Maintenance notes
Loosen and remove the 4 bolts securing each motor to remove it.
Remove the fan motors.
Clean the fan motors and connectors.
Fan connector and unit insertion and connection:
1 Insert the fan motors.
2 Fit and tighten the 4 bolts securing each motor to install it.
3 Fit and tighten the 4 bolts located on the fan cover to close it.
4 Connect the fan connectors and thermistors.
5 Fit and tighten the 4 bolts securing the electrical box.
6 Turn on the power supply switches after completing the maintenance work.
Maintenance of heat exchanger components
For KPI-(252-2002)E2E systems
Removal and cleaning of heat exchanger components
N O T E
Clean the components at least every two years to avoid a drop
in the air flow and the heat exchanger efficiency.
Turn off the power supply switches before starting maintenance
work and fit the appropriate safety locks and warnings.
Wait 5 minutes after turning off the power supply switches.
Pull on the hinges to open the service cover and then remove it.
C A U T I O N
The heat exchanger is a heavy item. Be careful when handling it.
Remove the heat exchanger by pulling on the handle.
Remove the filters located at the bottom left and bottom right of the heat exchanger.
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