YMGI WMMS-30CH-V2B(59)5, Руководство по обслуживанию, Страница: 63 / 81

YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
YMGI: Your Modern Green Idea
63
Troubleshooting for Normal Malfunctions
1. Air Conditioner Will Not Start Up
Possible Causes
Determination Method
(Air conditioner Status)
Status)
Troubleshooting
No power supply, or power
cable poorly connected After energizing, operation indicator isn't lit
and the buzzer makes no sound
Confirm whether it is due to power failure. If
yes, wait for power recovery. If not, check
power supply circuit and make sure the power
wire is securely connected.
Incorrect wire connection
between the indoor unit and
outdoor unit, or poor connection
to wire terminals
Under normal power supply circumstances,
operation indicator
isn’t lit after energization
Check the wiring according t o circuit
diagram and connect wires correctly. Make
sure all wiring terminals are securely
connected.
Electric leakage from air
conditioner After energization, circuit breaker trips
immediately.
Make sure the air conditioner is properly
grounded.
Make sure wires of air conditioner are
connected correctly.
Check the wiring inside air conditioner.
Check whether the power wire insulation is
damaged. If yes, replace the power wire.
The circuit breaker used for
the system is not adequate
for the outdoor unit model.
After energization, circuit breaker kicks off Install proper sized circuit breaker
Malfunction of remote controller
After energization, power indicator is lit on
display. No response to remote controller or
buttons.
Replace batteries for remote controller
Repair or replace remote controller
2. Poor Cooling (or Heating) performance for Air Conditioner
Possible Causes
Determination Method
(Air conditioner Status)
Troubleshooting
Set temperature is improper Check the temperature set on remote controller Adjust the set temperature
Rotation speed of the IDU
fan motor is set too low
Not enough air circulation Set the fan speed at high or medium
Filter of indoor unit is blocked Check the filter to see its blocked Clean the filter
Installation position for indoor
unit and outdoor unit is improper
Check whether the installation position is
appropriate according to installation
requirements for air conditioner
Adjust the installation position. Install the
o u t d o o r u n i t i n a n a r e a t h a t i s out of the
rain or direct sunlight.
Refrigerant leak
The discharge air temperature in cooling
mode is higher than normal.
The discharged air temperature in heating
mode is lower than normal.
Units system pressure is much lower than
normal range
Find the leakage cause and seal the leak. Add
refrigerant.
Malfunction of 4-way valve Unit blows cold air during heating Replace the 4-way valve
Capillary Malfunction
Circulated air temperature i n cooling mode
is warmer than normal circulated air
temperature.
Circulated air temperature in heating m o d e
is cooler than normal circulated wind
temperature.
S y s t e m pressure is substantially lower than
normal operating range. If there is no
refrigerant leak, part of capillary is blocked
Replace the capillary