A.O. Smith CAHP-MC-38 Installation, Operation And Maintenance Instructions page 40

AUX HEATER ON TEMP-*
AUX HEATER TEMP ADJ-*
AUX HEATER DIFF-*
AUX HEATER-*
AUX HEATER TYPE-*
MANUAL DEFROST
HP TEMP ADJ-*
EX-FACTORY RESET
Note: Select the menu item by pressing the Up/Down buttons. When the menu is selected, it will be highlighted with the
white background, then press the "MODIFY" button to set the related parameters. Press the "BACK" button to return to
the main page of the interface and press the "HELP" button to enter the menu for help.
Please refer to "Summer Tank Temperature Setting" section for detailed setting method of menu items marked with *.
AUX HEATER ON TEMP is the parameter which is used to determine whether the auxillary
heater should be enabled.
Setting Range: -5~30℃
Default Value: 15
AUX HEATER TEMP ADJ is the parameter which is used to determine whether the auxillary
heater should be enabled.
Setting Range: 3~8℃
Default Value: 6
AUX HEATER DIFF is the parameter which is used to determine whether the auxillary
heater should be enabled.
Setting Range: 1~4℃
Default Value: 2
AUX HEATER should be set as WITH or W/O based on the actual system installation.
Setting Options: WITH, W/O (Without)
Default Options: WITH
AUX HEATER TYPE should be set to determine the auxillary heater control logic.
Setting Options: STORAGE, TANKLESS, STATIC
Default Options: TANKLESS
MANUAL DEFROST is the menu item which could enforce a defrosting cycle even the heat
pump unit does not have defrosting request.
Please refer to "MANUAL DEFROST OPERATION PROCESS" section for detailed setting
method.
HP TEMP ADJ is the parameter to adjust the maximum water temperature for the heat
pump based on the total operation time. It would be reset to 0 after the HX CLEAN RESET.
Setting Range: 0~2℃
Default Value: 0
EX-FACTORY RESET is the menu item to reset all the parameters to be the ex-factory
settings.
Please refer to "CENTREL CONTROLLOR EX-FACTORY RESET OPERATION PROCESS" section
for detailed setting method.