Midea R410A Direct Heating Type HPWH 50Hz Technical Manual MCAC-HTSM-201906
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3 Trial run
3.1 Check list
Please check the items before operation in the table 3-3.1.
Table 3-3.1: Checking list before operation
Whether the unit is installed firmly.
Whether the air inlet and outlet of the unit has obstacle.
Whether the dial codes of each unit has dial to the correct position.
Whether check the leakage of the water system.
Whether the water system is clean.
Whether the filter is clean.
Whether the water drain is smoothly.
Whether complete the heat insulation of the water pipe.
Whether vacuum the pipeline of water side.
Whether all the valves in the water side pipeline are under correct status.
Whether the water flow switch work well.
Whether the grounding correctly.
Whether the power voltage meets the requirements of the unit.
Whether the leakage protector can work effectively.
When use the wired controller to operate the water heater, please check the items during trial running in the
table 3-3.2.
Table 3-3.2: Checking list during trial running
Whether all the buttons of wired controller are normal.
Whether the input voltage of the unit meet the requirements of the unit.
Whether the electronic lock has been unlocked.
Whether the water outlet temperature is normal.
Whether there is any abnormal vibration and noise during operation.
3.2 Special functions
Enter ‘Debugging replenishing’ method: Long press ‘CHECK’ button for 3~20s within 1 minute after power on,
then the digital screen will display ‘0’ and be flashed with 2Hz frequency, means enter to the function
selection state. Short check, the digital screen will successively display each corresponding number:
No. 5: Drain water mode;
No. 6: Force cycle pump operating;
No. 8: Force defrosting;
After 5s, the digital pipe will flash with 1Hz frequency; means has already entered the debugging replenishing
function.
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