Debugging Of The Unit; Preparation For The Debugging; Inspection Of Cooling System; Inspection Of Electric System - Gree GMV series Service Manual

Dc Inverter VRF plus Water Heater Solution Service Manual

15 DEBUGGING OF THE UNIT

15.1 Preparation for the Debugging

15.1.1 Preparation of Tools and Equipments
a．
Please confirm if the tools below have been prepared.
Manometer of corresponding refrigerants system
b． Please check if the testing software is correct before debugging.
c． Please check if all files and parameters which are required are complete.

15.1.2 Inspection of Cooling System

Please confirm if the cut-off valve of outdoor unit is in the state of max. opening angle and if the control wire of
electric expansion valve reliably connects with mainboard of indoor unit.

15.1.3 Inspection of Electric System

15.1.3.1 If there is any strong electromagnetic interference, mill dust or acid/alkaline gas around the unit.
a. The power-supply system can't work with the equipment with inverter or be close to the equipment which
can produce strong electromagnetic interference in case the unit can't work normally.
b. Prevent acid/alkalaine gas or liquid from cauterizing cable of the unit.
15.1.3.2 Power Capacity of the Unit
Due to the working current of the unit is varied under different conditions which is much more than the rated
current, the voltage may be unstable and capacity factor of the circuit may decrease, the power capacity shall be
1.5-1.8 times of rated power, or the compressor may not be started and the unit can't work normally.
15.1.3.3 The Selections for Air Switch and Fuse-link
a. Regarding the commercial air conditioner, the independent air switch, fuse-link and other protective
components shall be installed and the selection and use of them shall be proper.
Remarks:
a1. Air switch can be protections of overloading and short circuit. Its breaking capacity is not so good as fuse-link，
neither is its reaction speed. However, it can be reset manually after operation.
a2.Fuse-link just can be the protection of short circuit, and its breaking capacity and reaction speed are good but its
fuse shall be replaced after operation.
b． It is advised that customer shall select air switch according to the rated current of the unit. Usualy, the
current value of air switch shall be approximately 2.25 times as the rated current of the complete unit. Rated
current of fuse-link shall be 1.5 ~ 2 times as that of the unit.
15.1.3.4 Inspection of Components inside the Electric Box ( under supply interruption)
Inspect if there is any component broken off during transportation by eye. Then, check if there is any loose
component or wiring by hand. For huge unit, screw the terminals of patching board and wiring by screwdriver or
sleeve. Screw them again after 2 months' normal running. Auxiliary contact of AC contactor can't be removed
which has been debugged in factory.
15.1.3.5 Cautions of Laying Power Circuit
The power circuit of small unit shall be laid by trunking or flame-retarded PVC pipe and the power cord of
Inner hexagon spanner
Adjustable wrench
Phillips screwdriver
Slotted screwdriver
Vacuum pump
Electronic scale
Anemoscope
Heat indicator
Noise-monitoring equipment
Split-core type meter
Digital universal meter
Electric instrument
Timing counter
Double ladder
Debugger and data cable
INSTALLATION
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