Haier 2U14CS1ERA, Руководство по обслуживанию

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2U14CS1ERA-SM Service diagnosis
65
Domestic Air Conditioner
˄
A
˅
NO
YES
Yes
Check the status of LED1 on the
indoor mainboard. If the LED1
blinks interruptedly
˛
No
If the voltage is of a constant
value of 0V DCto5V DC
YES
measure the voltage between Jumpers 3 and
4 of IC1 on the indoor mainboard with a
multimeter.
NO
The outdoor mainboard is damaged;
Replace them with a new one.
If the LED1 is off within two minutes after the
machine is supplied with power, measure the
AC voltage between positions 1 and 3 on the
terminal of outdoor unit with a multimeter.
If 230VAC is available but 310DC not,
the power module is damaged, replace it
with a new one.
Test the outdoor power supply (230VAC
and +310VDC) with a multimeter.
The outdoor mainboard is damaged; replace
it with a new one.
The indoor mainboard is damaged; replace
it with a new one.
If the value varies between 0 and 80 VAC, the
outdoor mainboard is damaged, replace it
with a new one.
If the value is constant at about 30V, the
indoor mainboard is damaged, replace it with
a new one.
If both 230VAC and 310DC are
available,m12V(from7805)
is available.