24
6
USE AND OPERATION
LOW TEMPERATURE CHECk UNIT
The unit triggers this alarm if the water tank temperature
is below the measurement range (about 9 °C). The display
shows “LOW TEMPERATURE” and “CHECK UNIT”.
The red fault indicator (4) comes on and a beep sounds.
The temperature gage showst
.
The audible alarm can be canceled with the “Alarm off”
button (13).
• Switch off the unit at the mains switch (8).
• Move the unit to a warmer environment and leave
it off for about 2 hours.
• Switch the unit on again.
WARNINg
• Store the unit only in the approved
temperature range of 10 °C-40 °C.
Otherwise, it could be damaged.
• Operate the unit only in the ap-
proved ambient temperature range
of 10 °C-30 °C. Otherwise, it is not
safe to use and could be damaged.
If the unit continues to sound an alarm, take it out of
service and have it checked by an authorized service
technician.
CHECk UNIT → CUSTOMER SERVICE
The unit triggers this alarm if a variety of faults occur.
The display shows “CHECK UNIT” and “CUSTOMER
SERVICE”, the red fault indicator (4) comes on and a beep
sounds.
The audible alarm can be canceled with the “Alarm off”
button (13).
• Switch off the unit at the mains switch (8).
Take the unit out of service and have it checked by an
authorized service technician.
6.3.4
POWER FAILURE ALARM
The unit triggers this alarm if the power fails while it is
in operation. The red fault indicator (4) comes on and a
beep sounds. All other indicators are inactive.
The power supply in the unit will maintain the alarm for at
least 10 minutes without mains power.
• Switch off the unit at the mains switch (8).
The alarm ceases automatically when the
power is restored.
