Service manual

P29 OF 34
USER NOTES AND SERVICE LOG
CHECK AFTER INSTALLATION AND TEST OPERATION
YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR...
1. Before test operation
(1) Do not turn on power before installation is finished completely.
(2) Electric wires must be connected correctly and securely.
(3) Cut-off valves of the connection pipes should be back seated/tunned on.
(4) All the impurities such as scraps and thrums must be cleared out of the unit.
2. Test operation method
(1) Switch on power, press "ON/OFF" button on the wireless remote control to start the operation.
(2) Press MODE button, to select the COOL, HEAT (not available for cooling only unit is ), FAN and so on to check :
* All the functions (to make sure the unit functions correctly and poroenty).
* Refrigerant (pressures/temperatures at sericea values/pipes should be good).
* Drainage (condensate/water flow should be dripping out of drainage pipe ONLY).
* Noise (there should be no abnormal symbol)
Has the been unit positioned firmly?
The unit may drop, shake or emit noise.
Have you done the refrigerant leakage test?
It may cause insufficient cooling(heating)
capacity.
Is heat insulation sufficient?
It may cause unexpected condensate and
dripping.
Is drainage pipe tested ?
It may cause leakage or unexpect dripping.
Is the voltage in accordance with the rated
voltage marked on the nameplate?
It may cause electric malfunction
or damage to the part/unit.
Is the electric wiring and piping
connection installed correctly and securely?
It may cause electric malfunction
or damage to the part/unit.
Has the unit been connected to a secure
earth connection?
It may cause electrical leakage.
Is the power cord specified properly per
NEC codes ?
It may cause electric malfunction
or damage to the part/unit.
Is the air inlet and outlet been cleared?
It may cause insufficient cooling(heating)
capacity, and unexpected noise.
Has charge be adjusted to mateh the
and refrigerant capacity been recorded?
The refrigerant unit noise, iced up
overheat insufficient cooling or heating
Items to be checked
Possible malfunction
CHECK AFTER INSTALLATION
TEST OPERATION
P30 OF 34
YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR...
DURING INSTALLATION
Unit is pre-charged with refrigerant good for 25' of connection
tubes. If vacuum is held for about 30 minutes and no leak is
found, first back-seat the liquid (smaller) service valve by Allen
Wrench (hex head) slowly to release pre-charged refrigerant
from the condensing unit into the connection pipes and indoor
unit. If no abnormal things are found, fully open liquid (smaller)
and gas (bigger) service valves. Always replace and tighten
the caps onto service valves.
1) Put back all covers, screws removed during installation and start-up.
2) Properly note, mark, organize and secure wires.
3) Caulk the opening to weatherproof level at opening frame both inside and outside.
4) Do a final visual inspection.
5) Teach or instruct owner or users how to correctly operate the system and answer
their questions.
6) Check against all items in Product/Warranty Registration Card and sign it for the owner.
Releasing Refrigerant from Outdoor Unit to
Connected Pipes and Indoor Unit
RELEASE REFRIGERANT FROM OUTDOOR TO THE INDOOR UNIT
CHECK SYSTEM THOROUGHLY
TRIAL RUNNING
ADJUST REFRIGERANT
FINISH INSTALLATION
Check System Thoroughly to Make Sure the Unit is Ready for Trial Running: Check wires and pipes and
air intake and discharge and power and thermostat and others necessary components.
Thoroughly test the system in cooling, heating, auto and fan modes and so on for proper operation.
Adjust Refrigerant Charge by Tubing Size/Length: System charge could be adjusted per tubing size, length,
driers, and evaporator coils. DON'T overcharge or undercharge. Repair or correct any deficiencies.
If the connecting pipe is longer than 25 ft, adjust refrigerant as needed:
1/4" liquid line unit-add or deduct 0.3 OZ/ft.
3/8" liquid line unit-add or deduct 0.4 OZ/ft.
1/2" liquid line unit-add or deduct 1.2 OZ/ft.