Hitachi FSG Series Service Manual page 169

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WARNING: TURN OFF all power source switches
4. By lifting the drain hose and put the end in a bucket.
5. Removing Dust on Heat Exchanger
Remove the dust on the heat exchanger with a brush by
scratching dust downwards. Collect all dust in a bucket or
carton box.
6. Spray cleaning water over the fins of the heat exchanger.
7. Cleaning with Clean Water
Cover the wiring connectors with insulation tape. Operate
the pump and clean the heat exchanger with clean water
completely.
Adjust the pressure of pump so as not to damage fins
NOTES:
If the cleaning water remains, fins will be corroded.
Adjust the pressure of the pump at 2.5 to 5.0 kg/cm² so as
not to damage fins.
Bucket
Bucket
2
SERVICING
55
Drain Hose