11 Brief overview of operating states and alarms
ASTOTHERM PLUS Instructions for Use
37
Alarm
Dis
pl
a
y
“Sta
nd
b
y
“
LED
“Ala
rm“
L
ED
“Sta
rt“
L
ED
“O
n“
L
ED
Aco
us
tic
a
la
rm
s
ig
na
l
Possible
reason(s)
blue
yellow
green
green
Low
Temperature
Alarm
T
act
sounds
every 2
min.
Low temperature
(T
act
≤ T
set
- 4°C)
because of cold
liquid/high flow rate
or device defective
Excessive
Temperature
Alarm
T
act
T
act
> 45.5°C
± 1°C
Cable Break
Alarm
---
Temperature
sensor(s) or
associated
circuit(s)
interrupted
Processor
Alarm
OFF
Program failure
Manual
Excessive
Temperature
Alarm
Test 1
alternating
with
T
act
„Start” button has
been pressed for
longer than 3
seconds
Manual
Excessive
Temperature
Alarm
Test 2
alternating
with
T
act
„Increase” button
has been pressed
for longer than 3
seconds
Manual Low
Temperature
Alarm
Test 3
Alternating
with
T
act
after
cooling to
T
act
≤
T
set
– 4°C
„Decrease” button
has been pressed
for longer than 3
seconds
T
act
= Actual Temperature (current temperature of heat exchanger)
T
set
= Setpoint Temperature (selected temperature, marked by a frame)
=
LED is off
=
LED lights
=
LED flashes
8
1
11
5
3
