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MCAC-UTSM-2012--05 R407C MCCU Technical Manual
73
High pressure protection
Judge 1: Whether the wiring between the high pressure switch
and main control board is connected well or correctly
Judge 2: Whether the high pressure switch is broken
Yes
No
Connect it well
Validate: Short connect the high pressure switch
socket, check whether the system can run normally
Yes
Replace high pressure switch
No
Check whether the refrigerant system is ok
Replace outdoor PCB
No
Judge 3: Check whether the outdoor ambient temperature is too high
Yes
Stop the unit
No
Judge 4: Check whether the outdoor unit is bad ventilation
Yes
Make the outdoor unit ventilate well
No
Judge 5: Check whether the heat exchanger is dirty
Yes
Clean the heat exchanger
No
Judge 6: Check whether the refrigerant pipe is blocked
Yes
Exhaust refrigerant, then use the high
pressure nitrogen or refrigerant to
blow pipe, vacuumize and add the
refrigerant again
Summary of Contents for MCCU-10CN2
Page 20: ...R407C MCCU Technical Manual MCAC UTSM 2012 05 20 10 Wiring diagram cooling only 10 1 MCCU 7CN2...
Page 21: ...MCAC UTSM 2012 05 R407C MCCU Technical Manual 21 10 2 MCCU 10CN2...
Page 22: ...R407C MCCU Technical Manual MCAC UTSM 2012 05 22 10 3 MCCU 14CN2...
Page 23: ...MCAC UTSM 2012 05 R407C MCCU Technical Manual 23 10 4 MCCU 16CN2...
Page 24: ...R407C MCCU Technical Manual MCAC UTSM 2012 05 24 10 5 MCCU 22CN2...
Page 25: ...MCAC UTSM 2012 05 R407C MCCU Technical Manual 25 10 6 MCCU 28CN2...
Page 27: ...MCAC UTSM 2012 05 R407C MCCU Technical Manual 27 10 8 MCCU 45CN2...
Page 28: ...R407C MCCU Technical Manual MCAC UTSM 2012 05 28 Cooling and heating 10 9MCCU 7HN2...
Page 29: ...MCAC UTSM 2012 05 R407C MCCU Technical Manual 29 10 10 MCCU 10HN2...
Page 30: ...R407C MCCU Technical Manual MCAC UTSM 2012 05 30 10 11 MCCU 14HN2...
Page 31: ...MCAC UTSM 2012 05 R407C MCCU Technical Manual 31 10 12 MCCU 16HN2...
Page 32: ...R407C MCCU Technical Manual MCAC UTSM 2012 05 32 10 13 MCCU 22HN2...
Page 33: ...MCAC UTSM 2012 05 R407C MCCU Technical Manual 33 10 14 MCCU 28HN2...
Page 35: ...MCAC UTSM 2012 05 R407C MCCU Technical Manual 35 10 16 MCCU 45HN2...
Page 40: ...R40 11 5 7C CCU Tech 5MCCU 22C hnical Manua CN1 al MCAC C UTSM 201 12 05 40...
Page 42: ...R40 11 6 7C CCU Tech 6MCCU 28C hnical Manua CN1 al MCAC C UTSM 201 12 05 42...
Page 44: ...R40 11 7 7C CCU Tech 7MCCU 35C hnical Manua CN2 al MCAC C UTSM 201 12 05 44...
Page 46: ...R40 11 8 7C CCU Tech 8MCCU 45C hnical Manua CN2 al MCAC C UTSM 201 12 05 46...
Page 52: ...R40 11 1 7C CCU Tech 13 MCCU hnical Manua U 22HN2 MC al CCU 28HN2 2 MCAC C UTSM 201 12 05 52...
Page 54: ...R40 11 1 7C CCU Tech 14 MCCU hnical Manua U 35HN2 al MCAC C UTSM 201 12 05 54...
Page 56: ...R40 11 1 7C CCU Tech 15 MCCU hnical Manua U 45HN2 al MCAC C UTSM 201 12 05 56...