Troubleshooting
4-43
4-4-15. Outdoor unit Fan error (Error Code : E458, E475)
1. Test
items
1) Check the connection of Fan connectors (CN90, CN91)
2) Check the voltage of the fan motor connector in the inverter PBA of the outdoor unit.
3) Check the power connection of the outdoor unit Inverter PCB.
4) Check the Fan Motor single parts. (Be sure to turn off the power and separate the motor connector after 30 seconds!)
2. Check
procedure
No
No
No
Yes
Yes
Connect the fan connectors (CN90, CN91 or CN901) correctly.
ĺ
Power on.
ĺ
After checking normal operation, end the service.
Check the power connection of the Inverter PCB of the outdoor unit.
1. Check by referring to When the outdoor unit power is not ON -
Initial Diagnosis.
ĺ
Check everything is normal after replacing the
PCB at the fault in the Inverter PCB.
ĺ
End the service.
Check the
connection of the fan
connectors (CN90, CN91 or CN901).
1. Is the outdoor fan connector correctly
connected?
2. Are the wires of the outdoor fan
connector correctly
connected?
Check the
outdoor unit Inverter
PCB fan connector voltage
ĺ
After power is on, check the voltage
between connector pins.
1. Is the DC_Link voltage correct? (Normal: 280Vdc ≤
DC_Link voltage ≤ 360Vdc)
2. Is the fan control voltage correct? (Normal:
14Vdc ≤ FAN control voltage ≤ 16Vdc)
3. Is the fan command voltage?
(Normal: 2Vdc ≤FAN
command voltage
≤ 5Vdc)
Make sure to check after power Off!
checking normal operation
#1-#3 DC_Link Voltage (between DC_link and GND)
280Vdc ~ 360Vdc
#4-#3 DC_Link voltage (between DC15V and GND)
14Vdc ~ 16Vdc
#5-#3 FAN command voltage
(between fan control and GND)
2Vdc ~ 5Vdc
Measuring Part
Diagnosing Part
Value of good product
#5(YEL)-#3(BLK) resistance
(between fan control and GND)
Open (infinite resistance)
#4(WHT)-#3(BLK) resistance
(between DC15V and GND)
Approx. 1.0kΩ ~ 3kΩ
#5(YEL)-#3(BLK) resistance
(between fan control and GND)
Approx. 230kΩ ~ 280kΩ
#6(BLU)-#3(BLK) resistance
(between feedback and GND)
some MΩ or more or open
(infinite resistance value)
Motor Connector
Yes
Check the
single parts of Fan Motor.
(Be sure to turn off the power
and check after30 seconds!)
1. Are the resistance values between pins of
the fan motor connector similar to
those in the following
table?
※
At least 30 seconds after power is OFF, attach/detach the fan motor connector!
ĺ
Threatened to cause secondary damage to the motor and the PCB.
※
Check the Inverter PCB or Fan Motor single parts and only if there is a fault, replace!
※
Do not replace the Main PCB of the outdoor unit relating to the fault in the Fan Motor!
ĺ
If the error is indicated on 7-segment of the Main PCB of the outdoor unit, the Main PCB of the outdoor unit has no fault.
ĺ
In case of a control problem, it is possible to solve with S/W update.
