Johnson Controls DHMW24NKB21S, Owner'S Manual

Page: 23 / 28

15
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The following circumstance s are considered normal (based on mechanical and
environmental factors)
“ Operation ” Reason
Air condition ing unit
doesn’t run
Unit is turned off, then immediately
back on
Built - in delay in system prevents
restarting until pressures equalize -
about 3 minutes.
When first turned on
Delay at the outdoor unit when
indoor is first turned on.
Mist is blown from
air condition ng unit
When cooling
If humidity is high enough on initial
start up, mist may occur briefly.
Noise is heard from air
conditioner
Clicking sound(s) from outdoor
unit at power up Electronic expansion valve
resetting to home position.
Hissing sound heard when
cooling 5HIULJHUDQWLVIORZLQJWKURXJKWKH
SLSLQJDQGFRLOV
Hissing sound heard when
star
t ing or stopping
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Slight hissing sound heard when
running or after running
'UDLQSXPSRUFRQGHQVDWHGUDLQ
RSHUDWLRQFRROLQJ
Creak ing sound heard when
running or after running
&DQEHFDXVHGE\H[SDQVLRQDQG
FRQWUDFWLRQGXULQJDKHDWLQJF\FOH
HVSHFLDOO\LIWKHVSDFHLVYHU\FROG
Dust blown from air
condition ing unit
Occurs if operated with long periods of
no operation-dust will collect in the unit
Unit may need to be cleaned. Dust will
dissipate under normal conditions.
Odor from air
condition ing unit
When running
Usually due to environmental factors
such as chemicals, tar, nicotine or
cooking odors. If buildup becomes
severe, it will need to be cleaned.
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After-sales Service
If service is necessary, please contact your installer or local service provider for support.