Troubleshooting
Samsung Electronics
45
3-15 Outdoor unit fan error (Error Code : E458, 475 )
1. Check items
1) Check the connection of the fan connector (CN90, CN 91)
2) Check the voltage of the fan motor connector on outdoor unit inverter PBA
3) Check the power connection on outdoor unit inverter PBA
4) Check the fan motor (Motor connector must be disconnected after 30 seconds from power off)
5) For models with single fan, connector must be connected to CN90 (Fan2 error will not occur)
2. Check procedure
No
No
No
Yes
Yes
Properly connect the fan connector (CN90 or CN901)
o
Turn on the power
o
Check if everything is normal and end service
Check the power connection on outdoor unit inverter PBA
1. Refer to ‘When outdoor unit power does not come on – initial
inspection’ for inspection
o
If PBA has a problem,
change the PBA and check if everything is normal
o
end service
Check the connection
on fan connector (CN91 or CN901
1. Is the fan connector correctly connected?
2. is the wire on outdoor fan connector
correctly connected?
Check the voltage of
the fan connector on outdoor
unit inverter PBA
o
Turn on the power
and check the voltage between connector fans
1. Is the DC_link voltage normal? (Normal 280Vdc ≤
DC_Link voltage ≤ 360Vdc)
2. Is the fan command voltage normal? (Normal
14Vdc ≤ fan control voltage ≤ 16Vdc
3. Is the fan command control normal?
(Normal 2Vdc ≤ fan
command voltage
≤ 5Vdc
Turn off the power before inspection
Turn on the power and check if everything is
normal
o
end service
Proper connection
of the connector
with 2 outdoor fans
Proper connection of
the connector with
single outdoor fan
#1-#3 DC_Link voltage (Between DC_link – GND)
280Vdc ~ 360Vdc
#4-#3 DC voltage (Between DC15V-GND)
14Vdc ~ 16Vdc
#5-#3Fan command voltage (Between Fan control – GND
2Vdc ~ 5Vdc
Measuring part
Inspection part
Value
#1(RED)-#3(BLK) Resistance
(Between DC_link-GND)
Open
(Infinite resistance value)
#4(WHT)-#3(BLK) Resistance
(Between DC_15V-GND)
About 1.0kΩ ~ 3kΩ
#5(YEL)-#3(BLK) Resistance
(Between Fan control-GND)
About 230kΩ ~ 280kΩ
#6(BLU)-#3(BLK) Resistance
(Between Feedback-GND)
Over 1MΩ or open
Infinite resistance value)
Motor connector
Yes
Check the fan
motor (Motor connector must be
disconnected after 30 seconds from power off)
1. Is the resistance level between the pins on the
fan motor connector similar to
the below table?
* When connecting/disconnecting the fan motor connector, you must wait for 30 seconds after turning off the power
-> If not, motor or PBA can get damaged
* You must check the inverter PBA or fan motor and replace them only when they have problem
* Do not change the outdoor unit PBA with fan motor problem
o
If the 7-segment on the outdoor unit main PBA shows error, there is no problem with outdoor unit main PBA
o
Control related problems can be solved by S/W update
