Gree GMVVQ224WM/C-X Owner's Manual page 59

GMV Heat Recovery DC Inverter VRF
Check items
Is the address code of outdoor modules and the
code of module quantity correct?
Is the address code of indoor units and wired
controller correct?
Has the communication line been connected
correctly?
Is the piping connection and valve status correct?
Is the phase sequence of external power cord
correct?
Whether the engineering piping work and wiring
holes are sealed?
The above inspection items after installation are the inspection for some key components. Please
conduct the check according to actual needs.
4 Debugging and Operation
NOTES!
(1) Do set one (only one) module as the main module during debugging.
(2) When there is no special requirement, the other functions do not need to be set, and it can
be operated according to the factory settings. For special functions, please refer to the related
technical documents.
(3) Button description: short press: press the button for 3s and then release it; hold the button
for 5s: press the button for 5-10s and then release it; hold the button for 10s: press the button
for 10s and then release it.
4.1 Preparation before Test Run
(1) Installation and debugging operation must comply with the relevant regulations of the local
country or region.
(2) Debugging must be carried out by a professional or under the guidance of a professional. Do
not debug the air conditioning unit by yourself.
(3) All scattered objects, especially metal chips, wire ends and clamps, should be removed from
the body.
(4) Check if the terminals of the electrical components in the unit are loose and the phase
sequence is correct.
(5) Before debugging, all pipeline valves of the unit are required to be open.
(6) Power cannot be supplied until all installation work is completed.
4.2 Notices for Unit Debugging
(1) Before conducting the debugging, please ensure that the compressor has been preheated
for more than 2 hours, and check whether the preheating is normal by hand. Debugging can
be started up only when the preheating is normal, otherwise the compressor may be
damaged.
Possible conditions due to improper installation
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. The unit might be
damaged.
The unit cannot run normally. Phase sequence
error may happen.
Maybe there are mice biting the wires, which is
the cause of malfunction.
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Check