A.O. Smith CAHP-MC-38 Installation, Operation And Maintenance Instructions page 36

Operation
Move to "
CLEAR HEAT PUMP
" by pressing the Up/Down
FAULTS
button, then press SELECT button
to start this clearing process.
The "
CLEAR HEAT PUMP FAULTS
interface will be
subsequently. Press YES button to
excute the clearing or press the
NO button to cancel the clearing.
The clearing command will be
sent to all the heat pump units if
the YES button is pressed in
previous step and the UIM will
display "COMMAND SENDING
Press BACK button to return to
the previouse UIM interface.
Note: The fault information of ALL the heat pump units will be cleared after this operation.
Clear Heat Pump Faults
U S E R P U M P O N I N T V L
U S E R P U M P O N T I M E
A U X H E A T A T H - A M B T
H X C L E A N R E S E T
C L E A R H E A T P U M P F A U L T S
S E L E C T
"
C L E A R H E A T P U M P F A U L T S
displayed
Y E S
C L E A R H E A T P U M P F A U L T S
"
...
C L E A R H E A T P U M P F A U L T S
U S E R P U M P O N I N T V L
U S E R P U M P O N T I M E
A U X H E A T A T H - A M B T
H X C L E A N R E S E T
C L E A R H E A T P U M P F A U L T S
S E L E C T
Display
U S E R S E T T I N G
3 0 m i n
2 0 m i n
O F F
T
B A C K H E L P
C L E A R A L L T H E H E A T
P U M P F A U L T S ？
N O
C L E A R A L L T H E H E A T
P U M P F A U L T S ？
C O M M A N D S E N D I N G ...
C L E A R A L L T H E H E A T
P U M P F A U L T S ？
S U C C E E D E D ！
U S E R S E T T I N G
3 0 m i n
2 0 m i n
O F F
T
B A C K H E L P
Description
The clearing is successful if
the UIM display
"SUCCEEDED!".
If the UIM display
"FAILED!", it indicates the
clearing is unsuccessful,
please check the
communication
between the central
controller and the heat
pump units.