STP-H803/H1303 Series Instruction Manual
Table 10.3
Safety Functions (1/2)
Abnorm
ality
/Error
Operation
state of
safety functions
Lamp
indication
LCD
REMOTE
output signal
State of the ST
P
pum
p
Probable causes of an
abnormality/error
Reset by
RESET
switch
Power failure
Power failure
time: 2 seconds or
mo
re
"FAILURE"
lights.
"POWER"
goes out.
"Main Failure"
"A
L
A
R
M
"
"POWER ON"
output
cut-off
T
h
e m
agnetic bearing
continues to operate using
regenerative
energy.
The
STP pump de
ce
le
rate
s
and stops.
T
h
e rotor lands on the touch
down bearing.
Power failure.
Power cable breakage.
Power cable disconnection.
Impossible
Abnorm
al
magne
ti
c
bearing
Rotor descends
onto the touch
down bearing.
"F
AIL
U
RE"
"Disturbance
*_*"
"AL
ARM"
T
h
e S
T
P
p
u
m
p s
to
ps
.
S
T
P
c
on
n
ec
ti
on
c
ab
le
breakage.
STP connection cable
disconnection.
Abnormal control circuit.
Possible
Excessive
vibration
Rotor vibrates
excessively to
come into contact
with the touch
down bearing.
"F
AIL
U
RE"
"Disturbance
*_*"
"AL
ARM"
T
h
e S
T
P
p
u
m
p d
ec
el
er
at
es
and stops.
External vibration and
im
pact.
Intrusion of atmospheric
air.
Intrusion of foreign
mate
ri
al
s.
Possible
Overload of
mo
to
r dri
ve
r
The
STP pump
does not attain
the rated speed 30
m
inutes or m
ore
after it starts.
"FAILURE"
"DRIVER
Overload"
"ALARM"
T
h
e S
T
P
p
u
m
p d
ec
el
er
at
es
and stops.
L
eakage from
the vacuum
equipm
ent or piping.
Insufficient pressure at
inlet and outlet port sides.
F
ailure of starting of the
backing pump.
Possible
10-6
