Stulz Air Booster 2 - Motor Blocked Alarm Details; Faulty Upper Temperature Probe B1 Alarm; Faulty Middle Temperature Probe B2 Alarm; Faulty Lower Temperature Probe B3 Alarm

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AIR BOOSTER 2
EN/10.2018/IT30I © STULZ SpA – all rights reserved
Motor
blocked
i2F, i2P,
t2d
Alarm conditions occur when:
- Ctr = PrS (pressure
control)
- i2F = Mtr
Alarm is signalled if Dig-in 2
(DI2) is active for a time ≥ t2d
Normal operating condition is restored
when:
- Dig-in is deactivated
- Press the DOWN key for 3 sec
The alarm is also disabled by:
a. Instrument restart shutdown
b. Cycle of Stand-by/Off followed by restart.
Manual
“Mtr” message appears on
the display alternated with
standard display.
Motor blocked alarm will
open K1 relay and bring
An-out AO1 and AO2 to 0 V.
Faulty “Upper
Temperature”
probe B1
Ctr, tIP
There will be the probe alarm
if configured: b1 = y.
Alarm is signalled after
approx 10 seconds.
Automatic
Fault probe alarm will bring
An-out AO1 and AO2 to 0
V if Ctr = tPr (temp control)
and tIP = b1 or Avr or MAu.
Faulty
“Middle
Temperature”
probe B2
Ctr, tIP
There will be the probe alarm
if configured: b2 = y.
Alarm is signalled after
approx 10 seconds.
Automatic
Fault probe alarm will bring
An-out AO1 and AO2 to 0
V if Ctr = tPr (temp control)
and tIP = b2 or Avr or MAu.
Faulty “Lower
Temperature”
probe B3
Ctr, tIP
There will be the probe alarm
if configured: b3 = y.
Alarm is signalled after
approx 10 seconds.
Automatic
Fault probe alarm will bring
An-out AO1 and AO2 to 0
V if Ctr = tPr (temp control)
and tIP = b3 or Avr or MAu.
Faulty
pressure
probe
Ctr
There will be the probe alarm
if configured: b4 = y.
Alarm is signalled after
approx 10 seconds.
Automatic
Fault probe alarm will bring
An-out bring AO1 and
AO2 to 0 V if Ctr = PrS
(pressure control)
Find below the table with the list of alarm messages:
Label Meaning Mode
b1 Probe B1 alarm Flashing
b2 Probe B2 alarm Alternated with temperature
b3 Probe B3 alarm Alternated with temperature
b4 Probe B4 alarm Alternated with temperature
HA High temperature alarm Alternated with temperature
LA Low temperature alarm Alternated with temperature
HP High pressure alarm, manual reset Alternated with temperature
Fan Automatically reset “Fan Blocked” alarm Alternated with temperature
Fnb Manually reset “Fan Blocked” alarm Alternated with temperature
dMP Manually reset “Damper Blocked” Alternated with temperature
Mtr Manually reset “Motor Blocked” alarm Alternated with temperature
OFF Off state from key display Only message
Stb Stand-by state from digital input 1 display Only message
noL No communication between keypad and base Only message
nu Trying to view a probe that is declared missing Only message
The activation of any alarm involves:
• The activation of the buzzer and the activation of the alarm output;
• The display of the relative notification alarm (in flashing mode), on a rotating basis together with
existing alarms alternated with displayed probe by default (Lod). If the display also shows faulty
probe alarm, the display will show the alarms on a rotating basis.