Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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1.3.5 Error handling
When the unit has error or protection, the icon will flash. Press and hold SET key for 3
seconds to enter check status and then press the ▲ or ▼ key to check the unit of
#0~#15. If the ‘ERROR’ icon is on, it means the corresponding unit has error or
protection at that time. The last 3 error or protection codes of the unit can be checked.
The error icon will disappear if the error or protection is cleared.
For the error code, refers to trouble shooting part.
1.4 Installation of wired controller
1.4.1 Caution
Stated below are important safety issues that must be obeyed.
Confirm there is no abnormal phenomena during test operation after complete, then hand
the manual to the user.
Reinstallation must be performed by professional.
Do not install the unit in a place vulnerable to leakage of flammable gases. Once flammable
gases are leaked and left around the wired controller, fire any occur.
The wiring should adapt to the wired controller current. Otherwise, electric leakage or
heating may occur and result in fire.
The specified cables shall be applied in the wiring. No external force may be applied to the
terminal. Otherwise, wire cut and heating may occur and result in fire.
Circuit of wired controller is low voltage circuit. Never connect it with a standard 220V or
380V circuit or put it into a same wiring tube with the circuit.
The shield cable must be connected stable to the ground, or transmission may fail.
Do not attempt to extend the shield cable by cutting, if it is necessary, use terminal
connection block to connect.
Do not place the wired controller near the lamps, to avoid the signal of the controller to be
disturbed.
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