D.C. Inverter Multi-variable Modular
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5 Check Items after Installation and Trial Run
5.1 Check Items after Installation
Check Items
Conditions Might Happen
Check
Has the unit been fixed firmly?
The unit may drop, shake or emit noise.
Have you done the gas leakage test?
It may cause insufficient cooling/heating
capacity.
Is the unit get proper thermal insulation?
It may cause condensation and dripping.
Does the unit drain well?
It may cause condensation and dripping.
Is the voltage in accordance with the rated
voltage specified on the nameplate?
It may cause malfunction or damage the part.
Is the electric wiring and piping connection
installed correctly and securely?
It may cause malfunction or damage the part.
Has the unit been earthed securely?
It may cause electrical leakage.
Is the power cord specified?
It may cause malfunction or damage the part.
Has the inlet and outlet been blocked?
It may cause insufficient cooling/heating
capacity.
Has the pipe length and refrigerant charging
amount been recorded?
The refrigerant charging amount is not
accurate.
Is the address code of outdoor modules correct?
The unit can not run normally. Communication
malfunction might happen.
Is the address code of indoor units and wired
controller correct?
The unit can not run normally. Communication
malfunction might happen.
Has the communication line been connected
correct?
The unit can not run normally. Communication
malfunction might happen.
Is the piping connection and valve status right?
The unit can not run normally.
Whether phase sequence of external power cord
is correct or not?
Operation failure occurs or unit is damaged.
5.2 Trial Run
Note: during debugging, one and only one module must be set as a master module.
During debugging, one and only one IDU must be set as a master IDU.
When no special requirement is needed, no need to set other functions. Unit can operate
according to ex-factory settings. When special requirement is needed, please read the Service
Manual or Debugging and Maintenance Manual.
5.2.1 Preparation before trial run
(1)
The power supply should be turned on only after finishing all the installation.
(2) All the control wires and cables are connected correctly and safely.Completely open the gas
and liquid valves.
(3)
All the objects like metal filing, thrum and clip should be cleared after installation.
(4) Check if the unit appearance and piping system is damaged or not due to transportation.
(5) Check if the terminals of electrical element is loose and the phase sequence is correct or not.
(6) Check the valve: For single-module unit, fully open the gas and liquid valve and close oil
balance valve; For dual/three module unit, fully open the gas, liquid valve and oil balance
valve.
