I HAVE THE PRINTER RICOH SP210SU SHOWING SERVICE CALL-556 AND RED LIGHT NOT WORKING PLEASE HELP ON URJENT BASIS

This is most likely a fuser issue. If you have a spare laying around, I would suggest replacing your fuser. If you have a contract with Ricoh, I would suggest placing a service call for them to come out and look at the machine.

ressure roller fusing lamp temperature fluctuation The pressure roller temperature changes by ±20°C or more in one second. This occurs three times in one minute or two consecutive times.

Causes

• Loose connection of the pressure roller thermistor • Loose connection between the fusing unit and main frame

Remedy

1. Check if the fusing unit is properly set and connected to the main frame. 2. Check if the pressure roller thermistor connector is firmly connected. 3. Replace the fusing unit.




Ricoh Aficio AP3850C Error Codes
http://www.copytechnet.com/forums/ricoh-savin-gestetner-lanier/34525-ricoh-aficio-cl7000-sc-556-error-code.html

https://printcopy.info/?mod=erc&brand=Ricoh&model=SP210SU&code=SC556

I had the same problem, but solved it.
You have to connect your printer SP210 to your computer.
Search (in Windows) "Smart Organising Monitor Status"
Select Printer (new dialog box)
Click OK (see the error code SC545)
Click on User Tools
Printer Configuration
(Access Code is Admin074)
Find Fuser SC Reset under Maintanance
Click Ok
Close
Restart your printer
Your problem is solved now

OR

Without connecting your printer to Computer (you can do this):

Turn on the printer
Press C (Red colour centre) button once
Enter 107 (nothing will be shown)
Press the Green (Coping) button for 5 seconds
See the Display -->
Select Engine Maintenance
Select Ok
Select Fuse SC Reset (press down arrow - at down you will find it)
Execute (by Pressing the Down Arrow)
Done
Restart your printer.
Your problem should be solved....

The 556 error means that the rear fusing unit temperature sensor has shown a 50 degree C (or greater) change within one second. The unstable temperature issue has occurred twice. There are a few causes. Since you said that there was a brief power outage, the most likely is that the Aficio 2015 power supply unit has failed. The other possibilities is that the thermistor (the temperature sensor) is bad or out of position.

You'll need to contact Ricoh for service to resolve the problem. If you have a service contract for the MFP, contact that provider.

I hope this helps.

Cindy Wells

Red light all time when ink is finished and refilled it.

This blinking wrench red light means that your copier needs to be serviced. How old is your copier or how many copy have you done with it ?
Otherwise, you may need to call a service man for it.