A.O. Smith 120 through 250 Series User Manual
Page 73
is
Instruction manual BFC
73
S12 (blocking error)
Short circuit in sensor 1
of temperature sensor
T
1
at the top of the
tank
(1)
Short circuit in sensor
circuit
Replace sensor T
1
To replace the necessary parts, you must contact your installation
engineer
S13 (blocking error)
Short circuit in sensor 2
of temperature sensor
T1 at the top of the
tank
(1)
Short circuit in sensor
circuit
Replace sensor T
1
To replace the necessary parts, you must contact your installation
engineer
S14 (blocking error)
Short circuit from
dummy 1
Short circuit in sensor
circuit
Replace the dummy sensor
(2)
To replace the necessary parts, you must contact your installation
engineer
S15 (blocking error)
Short circuit from
dummy 2
Short circuit in sensor
circuit
Replace the dummy sensor
(2)
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
(3.10 "Electrical connection")
the appliance is phase-sensitive
See the BFC electrical diagram
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
(3.10.4 "Isolating transformer")
Contact your installation engineer to have an isolating transformer
installed
Code + Description
Cause
Solution
Remark