Error message to check fan #3. Where is it?

Maybe this will help. i would check fan first and see if ice has built up in fan.
https://www.youtube.com/watch?v=a4MdwuoN3jc

personally, i would check fan # 3.

57.x FAN FAILURE CALL SERVICE Control Panel Message 57.x FAN FAILURE CALL SERVICE Event Log Error Service Messages: 57.01.00 57.02.00 57.03.00 57.04.00 Required Action

1. A fan motor failure occurred. All fans are enabled to low speed operation at printer power-on. Fans will go into high-speed operation during the print cycle. All fans are disabled during PowerSave Mode.
   • x = 1: FM1 (Laser/Scanner Fan)
   • x = 2: FM2 (Power Supply Cooling Fan)
   • x = 3: FM3 (Formatter Fan)
   • x = 4: FM4 (Face Down Deliver Fan)
2. Cycle power. It the message continues, check and reseat cabling between the fan motor(s) and the DC Controller PCA.
   • Fan 1 J208
   • Fan 2 J216
   • Fan 3 J210
   • Fan 4 J225
3. Replace the faulty fan motor.

Fan Motor Error. Fan Motor 3 (FM3) is defective.

Switch the printer off and then back on. If the error continues:

1. Check cabling between fan motor(s) and DC Controller PCA.
2. Replace the faulty fan motor.
3. Replace the DC Controller.

Hello,
you can try fix your problem following this steps:

1. Check connector J018 on DC Controller and connector at Fan 3.
2. Check Fan 3, replace if necessary

57.x FAN FAILURE CALL SERVICE Control Panel Message 57.x FAN FAILURE CALL SERVICE Event Log Error Service Messages: 57.01.00 57.02.00 57.03.00 57.04.00 Required Action

1. A fan motor failure occurred. All fans are enabled to low speed operation at printer power-on. Fans will go into high-speed operation during the print cycle. All fans are disabled during PowerSave Mode.
   • x = 1: FM1 (Laser/Scanner Fan)
   • x = 2: FM2 (Power Supply Cooling Fan)
   • x = 3: FM3 (Formatter Fan)
   • x = 4: FM4 (Face Down Deliver Fan)
2. Cycle power. It the message continues, check and reseat cabling between the fan motor(s) and the DC Controller PCA.
   • Fan 1 J208
   • Fan 2 J216
   • Fan 3 J210
   • Fan 4 J225
3. Replace the faulty fan motor.

From service manual -
Error message condition one = fan protector operated.
Check:-
Fan,
Main Power pcb,
Main digital pcb.

The ProLiant DL380 G3 server requires that both primary and redundant fans exist in a specific configuration in order to perform optimally. Any deviation from the specified configuration will cause one of the above error messages to occur and the internal Health LED to illuminate. In a ProLiant DL380 G3 server without the redundant fan option, the server will shut down after the error message is displayed. In a server with the redundant fan option, the internal Health LED will illuminate and the appropriate error message regarding fan redundancy will be displayed. The purpose of this document is to detail the required configuration for both primary and redundant fans.
DETAILS Both primary and redundant fans in the ProLiant DL380 G3 server must be configured to meet specific requirements in order to avoid the error messages above and in some instances, subsequent shutdown of the server.
All primary fan locations (2, 4, 5, 6 and 7) must be populated with a fan before the redundant fan locations (1, 3, or 8) are populated. If a primary fan location is left unpopulated, the server will display one or more of the error messages shown above. In addition, the internal Health LED (the top LED on the front panel of the server) will display the status of the fans.
When the redundant fan option is used, all redundant fan locations must be populated. ProLiant servers do not support partial population of redundant fans. If any redundant fan location is populated without also populating all other redundant fan locations in the server, the fan system will not be fully redundant and one or more of the error messages above will be displayed.
Figure 1 below illustrates a ProLiant DL380 G3 server configured with all eight fans installed for fan redundancy. The server airflow is divided into three zones: processor, I/O and power supply. Shared fans 4 and 7 each provide airflow for two zones. If a shared fan fails, the failure is experienced in both zones.
Figure 1: ProLiant DL380 G3 server configured with all eight fans installed for fan redundancy
The internal Health LED (the top LED on the front panel of the server) indicates failed or missing components. The internal Health LED should be observed to determine the status of the fans as follows:
RED LED: A red LED indicates that the minimum fan requirements have not been met. Minimum fan requirements indicate that all primary fan slots must be populated with functioning fans.

• If the 1611 fan "x" is not present (where "x" is the fan location) error message is displayed at POST and the internal Health LED is red , then a primary fan is missing.
  
  
• If the 1611 fan "x" failure (where "x" is the fan location) error message is displayed at POST and the internal Health LED is red , then a primary fan has failed.

AMBER LED: An amber LED indicates that the minimum fan requirements have been met; however, requirements for redundant fan configuration have not been met. This means that all primary fan slots are populated with functioning fans, but at least one redundant fan has either failed or is missing.

• If the 1611 fan "x" is not present (where "x" is the fan location) error message is displayed at POST and the internal Health LED is amber , then a redundant fan is missing.
  
  
• If the 1611 fan "x" failure (where "x" is the fan location) error message is displayed at POST and the internal Health LED is amber , then a redundant fan has failed.
  

Note: In a redundant fan configuration, the error message fan system not fully redundant will also be displayed at POST if any redundant fan slot is left unpopulated or if a redundant fan has failed.

where is fan #3 in samsung dlp

that is a fan failure code, Either the Fuser fan ( most likely) behind the back cover near the front.Low voltage power supply fan or rear cover fan is not operating.
Most of the time it is the fuser fan that is not running or even if its running slow it will give you that error code.

Here are the notes
Problem:

Fan Failure Message (Code / Error 48)

Cause:

The machine logic detected a failure of the Fuser fan, LVPS fan or rear fan.

Solution: Fixed! Did not fix.

1. Insure there is adequate ventilation around printer. Refer to Section 1 of Service Manual for required clearances.
2. Follow the procedure in Chapter 3 for this error.
3. This problem can be very intermittent. Fans can work in diagnostics and fail in the middle of large print jobs. If unable to duplicate problem replace all 3 fans.
4. Use service diagnostics to verify the Fuser, LVPS, and ROS fans. These fans have a third wire which provides feedback to the Engine Board.
5. Visually check each or these fans for a build up of dust or toner.
6. There is a correction to this procedure in the Service Manual. The fans that can cause this error are the Fuser, LVPS, and ROS(laser fan). Not the Rear fan. The rear and bottom (developer) fans are not monitored by the system and won't generate this error.

Parts that may resolve this issue are:

• FAN ASSEMBLY, FUSER (63%)
• FAN ASSY; LOW VOLTAGE POWER SUPPLY (45%)
• FAN REAR ASSEMBLY (Laser Fan) (25%)