Mitsubishi Electric PUZ-WZ50VAA Service Manual page 14

Fresh Outside
Air Intake Mode
3. Be sure to carry the R290 detector and keep it working properly.
(17) Parts inspection and regular replacement
In addition to annual servicing, it is necessary to replace or inspect some parts after a certain period of system opera-
tion.
Please see tables below for detailed instructions.
Replacement and inspection of parts should always be done by a competent person with relevant training and qualifica-
tions.
See Section 11 "DISASSEMBLY PROCEDURE" for how to access and remove the parts.
Parts which require regular inspection
Parts
Pressure relief valve (3 bar)
Parts which require regular replacement
Parts
Pressure relief valve (PRV)
Air Separator
OCH816
MAX Fan Volume
Check every Possible failures
1 year PRV would be fixed and
(turning the knob expansion vessel would
manually) burst
Replace every Possible failures
6 years Water leakage.
ON
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