External Electrical Wiring Diagram - Gree GMV-72WM/B-U Owner's Manual

GMV DC Inverter VRF

4.9 External Electrical Wiring Diagram

(1) Every unit should be equipped with a circuit breaker for short-circuit and overload protection. In general, circuit
breaker is at OFF status.
(2) During operation, all indoor units and outdoor units belonging to the same system must be kept energized
status. Otherwise, the unit can't operate normally.
(3) Power supply for the unit should comply with ratings at the nameplate.
4.9.1 External wiring diagram.
5 Check Items after Installation and Trial Run
5.1 Check Items after Installation
Check Items
Has the unit been fixed firmly?
Have you done the gas leakage test?
Is the unit get proper thermal insulation?
Does the unit drain well?
Is the voltage in accordance with the rated voltage
specified on the nameplate?
Is the electric wiring and piping connection installed
correctly and securely?
Has the unit been earthed securely?
Is the power cord specified?
Has the inlet and outlet been blocked?
Has the pipe length and refrigerant charging
amount been recorded?
Is the address code of outdoor modules correct?
Is the address code of indoor units and wired
controller correct?
Has the communication line been connected
correct?
Is the piping connection and valve status right?
Whether phase sequence of external power cord is
correct or not?
Whether the engineering piping work and wiring
holes are sealed?
Fig.4.9.1
Conditions Might Happen
The unit may drop, shake or emit noise.
It may cause insufficient cooling/heating
capacity.
It may cause condensation and dripping.
It may cause condensation and dripping.
It may cause malfunction or damage the part.
It may cause malfunction or damage the part.
It may cause electrical leakage.
It may cause malfunction or damage the part.
It may cause insufficient cooling/heating
capacity.
The refrigerant charging amount is not
accurate.
The unit cannot run normally. Communication
malfunction might happen.
The unit cannot run normally. Communication
malfunction might happen.
The unit cannot run normally. Communication
malfunction might happen.
The unit cannot run normally.
Operation failure occurs or unit is damaged.
Maybe there are mice biting the wires, which is
the cause of malfunction.
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Check