Checking The Fan Inverter Heatsink For Clogging - Mitsubishi Electric PUHY-HP72 Service Handbook

[8-9 Troubleshooting Inverter Problems ]
8-9-15

Checking the Fan Inverter Heatsink for Clogging

Check the fan inverter heatsink for clogging by removing part of the duct and checking inside the duct.
To remove the duct, follow the procedures 1) through 2) below.
Reassemble the components in the reverse order as they were removed.
1) Remove the front service panel.
2) Remove the upper section of the duct by unscrewing the screws on the control box shown in the figure below.
Check inside the duct for clogging, and remove any foreign objects found.
Remove the two
screws holding the
top section of the
duct.
HWE18240_GB
Service panel
Top section of the duct
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