A.O. Smith SGS - 100, Installation & Service Manual

Page: 81 / 110

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Instruction manual SGS 81
S16 (blocking error)
Short circuit in temp.
sensor S4 at the bottom
of the storage tank
Short circuit in sensor
circuit.
Replace sensor S4 To replace the necessary parts, you must contact your installation
engineer
S17 (blocking error)
Short circuit in temp.
sensor S1 at bottom of
tank
Sensor is not (correctly)
connected
Replace sensor S2 To replace the necessary parts, you must contact your installation
engineer
S18 (blocking error)
Short circuit in temp.
sensor S1 in the
collector
Short circuit in sensor
circuit
Replace sensor S1 To replace the necessary parts, you must contact your installation
engineer
F01 (blocking error)
Defect in power supply
circuit
Live and neutral
connected wrong way
round
Connect live and neutral correctly (3.11 "Electrical connection") ;
the appliance is phase-sensitive
See the SGS electrical diagram (17 "Appendices")
Condensation on the
flame probe
1. Disconnect the lead at the flame probe
2. Ignite the appliance three times, with an interrupted ionisation
circuit
3. Reconnect the ionisation lead to the flame probe
4. Ignite the appliance again
5. The repeated ignition attempts will have caused the
condensation to evaporate
If errors persist, contact your installation engineer
Floating neutral Install an isolating transformer (3.11.4 "Isolating transformer") Contact your installation engineer to have an isolating transformer
installed
F02 (lock out error)
Fan fails to run at
correct speed.
Defective motor and/or
rotor.
1. Check the motor and rotor
2. Replace the fan if the motor or rotor is defective.
3. Reset appliance controller See the SGS electrical diagram (17 "Appendices")
To have the wiring replaced and a new fan fitted, you must contact
your installation engineer
Damaged wiring 1. Check the wiring between the fan and the controller.
2. If any wires are damaged, the wiring harness must be replaced.
3. Reset appliance controller
Code + Description Cause Solution Remark