Airwell YUDA060, Service Manual

Page: 50 / 70

no
start
as per the wiring
diagram, check if
communication
wiring is correct
yes
yes
yes
no
no
re-wiring, and
check again
check if the
communication port
connecting to the
indoor/outdoor PCB is
in open circuit
if the power cable and the
communication wire are
too close, resulting in the
wrong commission data
PCB is faulty,
replace and
check again
replace the
communication
connection wire,
check again
adjust the
distance and
check again
Trouble 4: Indoor PCB EEPROM data is wrong
1.If the failure occurs when being electrified for the first time, that shows EEPROM
(
8-bit pin) not fixed firmly or
damaged.
2.If the failure occurs when running, that shows EEPROM is faulty and need to be replaced.
Trouble 5: Indoor repeated unit number
Check the failure code on outdoor indicator board (5-lamp)
>_]]VbTZR\ <Zb >_^UZdZ_^Vb
Trouble 3: Communication failure between indoor and outdoor
Trouble 5: Outdoor unit failure
start
no
yes
no
no
yes
as per the wiring
diagram, check if
connection port
between sensor and
PCB is correct
re-fix the
sensor and
check again
check if the sensor
is in open circuit or
the connection port
to PCB is in good
condition
check if the
sensor resistor
value is correct
replace sensor
and check
again
replace sensor
and check
again
PCB is faulty
and repalce it,
check again
yes
Trouble 6: Outdoor unit alarms sensor failure
50