Outdoor Unit Fan Error - Samsung AM040KXMDEH/EU Service Manual

Troubleshooting
4-3-15 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
Turn off the power before inspection
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
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
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?
Turn on the power and check if everything is
normal
* 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
If the 7-segment on the outdoor unit main PBA shows error, there is no problem with outdoor unit main PBA
Control related problems can be solved by S/W update
36
Yes
Turn on the power
Yes
Yes
end service
Properly connect the fan connector (CN90 or CN901)
No
Turn on the power
Proper connection Proper connection of
of the connector the connector with
with 2 outdoor fans single outdoor fan
Check the power connection on outdoor unit inverter PBA
No 1. Refer to 'When outdoor unit power does not come on – initial
inspection' for inspection
check if everything is normal
#1-#3 DC_Link voltage (Between DC_link – GND)
#4-#3 DC voltage (Between DC15V-GND)
#5-#3Fan command voltage (Between Fan control – GND
Measuring part
No
Motor connector
Check if everything is normal
and end service
If PBA has a problem, change the PBA and
end service
280Vdc ~ 360Vdc
14Vdc ~ 16Vdc
2Vdc ~ 5Vdc
Inspection part
#1(RED)-#3(BLK) Resistance
(Between DC_link-GND) (Infinite resistance value)
#4(WHT)-#3(BLK) Resistance
About 1.0kΩ ~ 3kΩ
(Between DC_15V-GND)
#5(YEL)-#3(BLK) Resistance
About 230kΩ ~ 280kΩ
(Between Fan control-GND)
#6(BLU)-#3(BLK) Resistance Over 1MΩ or open
(Between Feedback-GND) Infinite resistance value)
Samsung Electronics
Value
Open