Panasonic WH-ADF0309J3E5CM Service Manual page 70

11.2.9.2 Maintenance for Pressure
Relief Valve ⑬

It is strongly recommended to operate the valve
by turning the lever up & release it down a few
times to ensure free water flow through discharge
hose at regular intervals to ensure it is not blocked
and to remove lime deposit.

Use a container to collect high volume of
discharge water from the discharge hose.
11.2.9.3 Maintenance for Safety Relief
Valve

It is strongly recommended to operate the valve
by turn the knob counter clockwise to ensure free
water flow through discharge pipe at regular
intervals to ensure it is not blocked and to remove
lime deposit.
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