Test Run; Checks Before Test Run; How To Cope With Test Run Abnormality - LG Multi V Space II ARUN053GF2 Installation Manual

20
Without Cool/Heat Selector Installation and Connection
In case, try to set mode without Cool/Heat Selector and try to use
other switch except from LG Outdoor Cool/Heat Selector in field.
Connect signal terminal block as below figure and description.
- How to set mode without Cool/Heat Selector
• Cooling Mode Setting
① ' GND Connection
② ' Off (Open)
• Heating Mode Setting
① ' GND Connection
② ' GND Connection
• Fan Mode Setting
① ' Off (Open)
② ' GND Connection

TEST RUN

Checks Before Test Run

Check to see whether there is any refrigerant leakage, and
1
slack of power or communication cable.
Confirm that 500 V megger shows 2 MΩ or more between
power supply terminal block and ground. Do not operate in
the case of 2 MΩ or less.
NOTE: Never carry out megaohm check over terminal con-
trol board. Otherwise the control board would be
broken.
Immediately after mounting the unit or after leaving
it turned off for an extended length of time, the re-
2
sistance of the insulation between the power sup-
ply terminal board and the ground may decrease to
approx. 2 MΩ as a result of refrigerant accumulating
in the internal compressor.
If the insulation resistance is less than 2 MΩ, turn-
ing on the main power supply and energizing the
crankcase heater for more than 6 hours will cause
the refrigerant to evaporate, increasing the insula-
tion resistance.
Check if high/low pressure common pipe, liquid pipe and
gas pipe valves are fully opened.
3
NOTE: Be sure to tighten caps.
Check if there are any problems in automatic addressing or
not:
4 Check and confirm that there are no error messages in the
display of indoor units or remote controls and LED in out-
door units.
CAUTION
!
When cutting main power of the Multi V
• Always apply main power of the outdoor unit during use of product
(cooling season/heating season).
• Always apply power 6 hours in advance to heat the crank case
heater where performing test run after installation of product. It
may result in burning out of the compressor if not preheating the
crank case with the electrical heater for more than 6 hours. (In case
of the outdoor temperatue below 10 °C (50 °F))
CAUTION
!
Preheat of compressor
• Start preheat operation for 3 hours after supplying main power.
• In case that the outdoor temperature is low, be sure to supply
power 6 hours before operation so that the heater is heated(in-
sufficient heating may cause damage of the compressor.)
GND
GND
GND

How to Cope with Test Run Abnormality

The phenomena from main component failure
Compo-
Phenomenon
nent
Motor insula-
tion broken
Strainer
Not operating
clogged
Oil leakage
Compres-
sor
Stop during Motor insula-
running tion failure
Abnormal
R-S-T miscon-
noise
nection
during running
Motor failure,
Outdoor High pressure bad ventilation
fan error at cooling around outdoor
heat exchanger
Heating failure,
Bad connector
frequent de-
contact
frosting
No operating
sound at apply- Coil failure
ing power
Heating failure,
Outdoor
EEV frozen outdoor
EEV clogged
heat exchanger
part
Low pressure
error or dis-
EEV clogged
charge temper-
ature error
When system fault occurs, the error code is displayed at indoor unit
display or remote control display, the trouble shooting guide is in the
service manual
Night Low Noise
ARUN series
In cooling mode, this function makes the ODU fan operate at low RPM
to reduce the fan noise of ODU at night which has low cooling load.
Max. RPM setting method
Master ODU
Dip S/W ON
SW01B
Master ODU
Main PCB Power Reset
SW01S
Note 1)
SW01V
Setting the Fan Max. RPM
SW02V
Setting Complete
※ Dip S/W setting
- cooling : No. 12+14
- cooling and heating : No. 12+13+14
CAUTION
!
• Request installer to set the function during installation.
• In case the function is not used, set the dip S/W OFF and reset the
power.
• If ODU RPM changes, cooling capacity may go down.
Check method and Trouble
Cause
shooting
Check resistance between
terminals and chassis
Change strainer
Check oil amount after
opening oil port
Check resistance between
terminals and chassis
Check compressor R-S-T
connection
Check the outdoor fan oper-
ation after being turned the
outdoor units off for some
time.
Remove obstacles around
the outdoor units
Check connector
Check resistance between
terminals
Service necessary
Service necessary