MCAC-RTSM-2013-12 Midea High-temperature Direct-heating Heat Pump Water Heater Technical Manual
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Icon description
1. Operation icon : Indication of unit ON or OFF status
2. Mode area: Indicate the main unit operation mode.
3. Setting temperature: Three statuses about water temperature, setting water temperature and
setting cycle water temperature can be displayed.
4. Timing On/OFF indication : Indicate the timing information. Three timers can be set on
the wire controller: Timer 1, Timer 2, and Timer 3. These three timers can control the main unit to turn
ON and OFF three times at most during one day.
5. Function icon:
1) : Display when water heater system connects to Modbus network;
2) : Display when other heat source is provided to the system;
3) : Display when water heater maintenance is needed. You can press and hold “AUXILIARY”
key for 3 seconds to cancel the icon and timing will restart until next maintenance;
4) : Display when cycle heating function is operational;
5) : Display when electric auxiliary heating function is operational;
6) : Display when check function is operational;
7) : Display when ambient temperature is below 2℃ which means the main unit need
anti-freezing action;
8) : Display when no key operation for 2 minutes and all keys are locked.
You can press and hold “OK” key for 3 seconds to unlock;
9) : Display when error or protection occurs and means the unit need maintenance by
professionals.
6. On-line unit qty. indication: Under normal status display the quantity of units connected to the wire
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
display the setting value; under check status displays check parameter;
10. ON/OFF key: Turn on and turn off functions;
11. Right and Left key: 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 step
setting under timing setting status; Press these keys to turn over the unit parameter information
under check status;
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