DIAGONSIS CODE, POSSIBLE CLAUSES, AND SUGGESTED ACTIONS TO
USER AND TECHNICIAN
DIAGNOSIS CODE & TROUBLE-SHOOTING GUIDELINE
Codes
Descriptions
Possible Reasons
Suggestion to User
Technician Trouble-Shooting
E1
Condensate Full in drain pan
Dain pan dirty, drain hose
clogging, water level switch
failure, loose connection,
bad control board/
components, etc.
Check if drain hose is
clogged; if not, need to call
your installing or service
technician.
E2
Indoor air temp. sensor failure
Bad temperature sensor;
loose connection, damaged
wires, bad control board/
components, etc.
E3
Indoor coil copper tube
sensor failure
Bad temperature sensor;
loose connection, damaged
wires, bad control board/
components, etc.
Lift up grille/cover, to check
if the sensor looks bad or
drops out of holding socket/
pocket; or, to call installing
or service technician.
E4
Abnormal cooling
E5
Abnormal heating
Dirty filters/coils, refrigerant
leaks over time, pipe too
long, kinks or clogging in
pipe line or valves, pipe
damage, sensor failure,
compressor or board or
other component failures,
etc.
1) Regularly check and
clean indoor unit filters,
indoor and outdoor coils.
2) The service valves at
outdoor unit should be
generally cool at cooling
mode, hot at heating
mode;
3) Call your installing or
service technician to
check unit.
E6
Cooling-outdoor coil low
temp. protection
Outdoor too cold to run
cooling mode, windy, too
much refrigerant, short
piping, etc.
E7
Cooling-Indoor coil anti-
freeze protection
Dirty filter/coils, indoor fan
motor failure, loose blower
wheel/motor connection, too
much or less refrigerant,
pipe/cap. tube/valve
clogging, etc.
E8
Heating-outdoor coil high
temp. protection
Outdoor temperature too
warm to run heating mode,
too much refrigerant, short
piping, etc.
E9
Heating-indoor coil anti-to
hot protection
Dirty filter/coils, indoor fan
motor failure, loose blower
wheel/motor connection, too
much refrigerant, pipe/cap.
tube/valve clogging, etc.
E0
Heating-outdoor coil too
cold protection
Outdoor temperature is too
cold to run heat pump/
heating.
1) Shut off the unit;
2) Cooling, wait until
weather allows the unit
to re-start, or switch to
alternative cooling
equipment which allows
lower ambient cooling;
3) Heating, wait until
weather allows the unit
to re-start, or switch to
base-board heater, gas
furnace or other
alternative heating
sources during cold
hours/days.
1) Check if these are
caused by installation or
component failure;
2) There could be nothing
abnormal, but the unit is
at protection mode, which
means the current
ambient temperature is
not proper to run the unit;
3) If there is something
wrong, need to find all
the clauses and correct
or fix the problems and
not to leave any bugs.
1) Shut off power;
2) Follow possible clauses
listed at the left, to check
one by one;
3) To save time for quick
diagnosis as much as
posible, suggest your
technician to make
appointment with YMGI
tech. support, and call us
while the techician is at
job site.
4) Better to check the unit,
get problems and model
model #, and serial #
ready, before calling
YMGI tech. support.
5) Need the technician
physically, at the job site,
use right tools and
experience, to find all the
clauses and correct or fix
the problems and not to
leave any bugs.
INST
ALLER'S
INSTRUCTION
INST
ALLER'S
INSTRUCTION
P39 OF 44
P40 OF 44
CHECK AFTER INSTALLATION AND TEST OPERATION
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
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.
FINISH INSTALLATION
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
