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A.O. Smith 28 30 50 60 Water Heater User Manual

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of 96

is

Release R.1.3 UK 74

Warning

Maintenance may only be performed by a qualified service and maintenance engineer.

S12 (blocking error)

Short circuit from

sensor 1 of

temperature sensor T

1

at the top of the tank

Short circuit in the

sensor circuit

Replace sensor T

1

. To replace the necessary parts, you must contact your installer.

S13 (blocking error)

Short circuit from

sensor 2 of

temperature sensor T

1

at the top of the tank

Short circuit in the

sensor circuit

Replace sensor T

1

. To replace the necessary parts, you must contact your installer.

S14 (blocking error)

Short circuit from

dummy 1

Short circuit in dummy

circuit

Replace the dummy sensor

(2)

. To replace the dummy sensor you must contact your installer.

S15 (blocking error)

Short in circuit of

dummy 2.

Short circuit in dummy

circuit

Replace the dummy sensor

(2)

. To replace the dummy sensor you must contact your installer.

Table 10.2 Displayed errors (Sheet 2 of 10)

Code + Description Possible cause Solution Remark

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