A.O. Smith TWI 35-200, Installation, User And Service Manual

Page: 22 / 92

Status text Explanation
Heat demand There is a heat demand.
External switch The external switch is active.
3.2.1 Operating modes
The Twister has 3 operating modes:
• OFF mode (see 3.2.1.1)
• ON mode (see 3.2.1.2)
• External ON mode (EXT mode) (see 3.2.1.3)
3.2.1.1 OFF mode
In the OFF mode the water heater is de-activated. The control switch is set in the
position 0.
3.2.1.2 ON mode
In the ON mode the water heater responds to the heat demand. The control switch is set
in the position I.
3.2.1.3 External ON mode
In the external ON mode, the water heater will respond to a heat demand when the relay
switch is closed. Use the menu to enable the external ON mode switch (see 10.5.1).
3.2.2 Error conditions
If there is an error, the display shows the status text Error including the exclamation
mark.
Fig. Error status
MENU
Tank Temperature
Operating Setpoint
Status: Error
35°C
60°C
Note
When the display shows an error, try to reset the water heater.
Contact your service and maintenance engineer or supplier when the water heater does
not restart or when the display shows the error again.
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22 User part