Daitsu CDV-46 Manual page 63

Wired Controller CDV-46
Fig.6.16 Turn on Filter Clean Reminder Function in Fahrenheit
Note:
Description on cleaning level: When setting the Filter Clean Reminder
Function, timer zone will display 2 digits, of which the former indicates the pollution
degree of operating place and the latter indicates the operating time of indoor unit.
There are 4 types of situations:
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