YMGI
•
Your Modern Green Idea
54
Check Items after Installation and Trial Run
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 properly thermal insulated?
It may cause condensation and dripping.
Does the unit drain properly?
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 grounded 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 cannot run normally. Communication malfunction
might happen.
Is the address code of indoor units and wired
controllers correct?
The unit cannot run normally. Communication malfunction
might happen.
Has the communication line been connected
correctly?
The unit cannot run normally. Communication malfunction
might happen.
Is the piping connection and valve status correct?
The unit cannot run normally.
Is the phase sequence of external power cord
correct or not?
Operation failure occurs or unit is damaged.
Is the engineering piping work and wiring holes
sealed correctly?
Maybe there are mice biting the wires, which is the cause
of malfunction.
Trial Run
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, there is no need to set other functions. Unit can operate according to
factory settings. When special requirement is needed, please read the Service Manual or Debugging and
Maintenance Manual.
Preparation before trial run
1.
The power supply should be turned on only after finishing all of 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 was damaged during transportation.
5.
Check if the terminals of electrical element are loose and the phase sequence is correct.
6.
Check the valve:
For single-module unit, fully open the gas and liquid valve and close oil balance valve.
For dual/three module units, fully open the gas, liquid valve and oil balance valve.
