Checking The Fan Inverter Heatsink For Clogging - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[8-9 Troubleshooting Inverter Problems ]
8-9-16

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 3) below.
Reassemble the components in the reverse order as they were removed.
1) Remove the front service panel.
Service panel
3) Remove the upper section of the duct by unscrewing the screws on the control box (on the inverter box on the P250 model) shown in the figure
below.
Check inside the duct for clogging, and remove any foreign objects found.
Top section of the
duct
BS_08_C
2) Remove the main control box (applicable to the P250 model only).
Main control box
Remove the two
screws holding the
top section of the
duct.
P250
Inverter box
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