User Manual
BW-50-070/10
Page 11 of 16
8 Alarm functions and indication
In case of an alarm, the associated red lamp will be lit and the beeper will sound intermittently. Only the
∆
T alarm can be silenced for 10 minutes by pressing the alarm button. All other alarms require some
action.
In most alarm conditions the warming will stop. This can be seen by the fact that no temperature lamp is
lit. In such case the only way to silence the alarm is to press the Start/Standby knob.
Alarm
Symbol
Reason
Warming
Over-temperature
Water temperature > 39.5
o
C Will
stop
Temperature deviation
∆
T
The water-temperature deviates
more than +/- 1
o
C
Continues for 10
min.
NOTE: This alarm is not activated until set temperature is reached or 4 hours after start - whichever
happens first. The alarm can be silenced for 10 min. but if after that the temperature still differs more
than +/- 1
o
C the warming will stop.
No Water Mattress
H
2
O
The heating pad is not inserted into
the water mattress or too little
water
Stops
Pad fault
Heating pad is faulty or not
connected
Will not start or
stops
Control Unit fault
Technical failure
Will not start or
stops
Supply voltage failure
Supply voltage (mains or
battery)has disappeared or been
switched off without pressing
Start/Standby first
Stops
Internal battery
∆
T
+
H2O
+
Internal battery is weak or missing
at start up. Press and hold the
Alarm button when restarting.
Replace battery as soon as possible
Will not start
9 Trouble shooting
Symptom
Probable cause
Remedy
No supply voltage connected
Connect supply cable
Power switch on rear panel in
“OFF” position.
Check On/Off switch
No lamp lit
Control Unit fuses blown
Check fuses/contact
technician
lamp is blinking and the
acoustic alarm is on
Supply voltage has disappeared
during warming
Check supply voltage and that
the unit automatically starts
when supply voltage is restored
The water temperature is >
39,5
o
C.
Check if some external heat
source has influenced the unit.
Error in the Control Unit or the
Heating Pad
Let a technician check the unit.
lamp is blinking
Too little water during warming
up with tilt
Add 2 cm water above the level
line.
Water temperature deviates
more that +/- 1
o
C from
selected value.
Check for any external
influences. Has the unit been
moved to another bed without
switching it off?
lamp is lit
The selected water temperature
has not been reached after 4
hours
Check the bedding. Is the water
mattress placed on an
insulating surface?
Restart again.