Ultra Heat GMV Multi VRF_Heat Recovery Serial
45
5 Check Items after Installation and Trial Run
5.1 Check Items after Installation
Possible conditions due to improper installation
Each part of the unit is installed securely?
Unit may drop, shake or emit noise
Gas leakage test is taken or not?
Insufficient cooling (heating) capacity
Unit gets proper thermal insulation or not?
There may be condensation and dripping.
Drainage is smooth or not?
There may be condensation and dripping.
Is the voltage in accordance with the rated voltage
specified on the nameplate?
Unit may have malfunction or components may get
damaged.
Is the electric wiring and pipe connection installed
correctly?
Unit may have malfunction or components may get
damaged.
Unit is securely grounded or not?
Power cord meets the required specification?
Unit may have malfunction or components may get
damaged.
Is the air inlet/outlet blocked?
Insufficient cooling (heating) capacity
Length of refrigerant pipe and the charging amount
of refrigerant are recorded or not?
The refrigerant charging amount is not accurate.
Is the address code of outdoor modules and the
code of module quantity correct?
The unit cannot run normally. Communication
malfunction might happen.
Is the address code of indoor units and wired
controller 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. The unit might be
damaged.
Is the phase sequence of external power cord
correct?
The unit cannot run normally. Phase sequence error
may happen.
Whether the engineering piping work and wiring
holes are sealed?
Maybe there are mice biting the wires, which is the
cause of malfunction.
Whether the metal parts supplied for transportation
are taken down?
Make sure that the metal parts supplied for
transportation are taken down.
5.2 Trial Run
Note: during debugging, one and only one module must be set as a master module.
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 filling, thrum and clip should be cleared after installation.
(4) Check if the unit appearance and piping system are damaged or not due to transportation.
(5) Check if the terminals of electrical element are loose and the phase sequence is correct or not.
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