Midea R410A Direct Heating Type HPWH 50Hz Technical Manual MCAC-HTSM-201906
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④ Timing ON/OFF indication ( ): Indicate the timing information.
⑤ Function icon:
: Display when water heater system connects to Modbus network;
: Displays when other heat source is provided to the system.
: Displays when water heater maintenance is needed. Press and hold ‘AUXILIARY’ key for
3 seconds to cancel the icon and timing will restart until next maintenance.
: Displays when cycle heating function is on.
: Displays when electric auxiliary heating function is on.
: Displays when check function is on.
: Displays when ambient temperature is below 2ºC which means the main unit need
anti-freezing action.
: Displays when no key operation for 2 minutes and all keys are locked. Press and hold
‘OK’ key for 3 seconds to unlock.
: Displays when error or protection occurs and means the unit need maintenance by
professionals.
⑥ Online quantity indication: Under normal status display the quantity of units connected to the
wired controller; under check status display the device serial number.
⑦ Water level indication: Under normal status displays water level; under water level setting status
displays setting value.
⑧ Clock: Under normal status displays clock; under timing setting displays the setting timing.
⑨ Water temperature: Under normal status display water temperature; under water temperature
setting status displays the setting value; under cycle heating water temperature setting status displays
the setting value; under check status displays check parameter.
⑩ ON/OFF key ( ): Turn on and turn off functions.
11 Right and left key ( and ): Press these keys to check setting water temperature, setting cycle
heating water temperature and setting water level under main page; press right key to shift to the next
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