Sterling SDF 250 - Manual (Page 34)

SDF 250/400/500
Error and error correction 4-4
Error Bypass Flap
The bypass flap does not close or closes too slowly.
Check the bypass flap.
Error Valve Block
The valve block has not reached the proper position. The main switch is placed in the off position.
Check the position of the valve block. Press the “ACK” key and put the main switch in the on
position immediately. If the valve block has not reached the correct position within 1 minute, the
main switch is again placed in the off position.
Sterling Service.
Temperature Measurement Outgoing Air Defective
Check cables and sensor.
Temperature Measurement Return Air Defective
Check cables and sensor.
Excess Temperature Return Air
Check cables and sensor.
Check the return air cooler.
Temperature Measurement Drying Heater Defective
Check cables and sensor.
Check the power supply.
Short circuit check.
Excess Temperature Drying Heater
The drying temperature is too high.
Check the safety temperature limiter.
Sterling Service.
Insufficient Temperature Drying Heater
The drying temperature is too low.
Check the drying heater.
Temperature Measurement Heater Defective Hopper X
(X = number of the drying hopper)
Check cables and sensor.
Check the power supply.
Short circuit check.