8-5
8. Troubleshooting
Message Possible Cause Possible Solution
RH SENSOR
FAIL RH sensor failed to communicate
Cable disconnected
Check wiring from CMM board to moisture board.
Bad RH sensor module
Check CMM program version of 1.51 or later.
FILTER MISSING
Detected missing moisture filter
Cable disconnected
Check wiring from CMM board to moisture board.
Bad RH sensor module
Incorrectly configured for moisture monitoring (contact local distribution.)
Dewpoint High
Dewpoint above set maximum level
Filter saturated and needs to be
replaced
Replace filter
Bad RH sensor module
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