Stulz Air Booster 2 - Shutdown Adjustment Delay Behavior; Alarm Management and Error Codes

23
AIR BOOSTER 2
© STULZ SpA . – all rights reserved EN/10.2018/IT30I
Shutdown adjustment delay
Upon shutdown of the controller from the keypad or remotely, therefore “System OFF” or “System
Stand By”, the controller will continue to work throughout the delay upon shut-down time (toF).
• Switch from “System ON” to “System OFF” and vice versa by pressing ON/OFF button on the
keypad.
• Switch from “System ON” to “System Stand By” and vice versa by switching the signal on the
digital input DI1, if configured as Remote Enable.
INFORMATION
The ON/OFF button on the keypad will have priority on the remote contact, therefore if the
button is pressed when in “System Stand By” it will go to “System OFF”.
System state Behaviour
System ON Normal operation of the controller
System OFF
All the disabled outputs and inputs, when alarm output polarity (AoP) = oP,
K4 alarm relay will normally remain energised
System Stand-by
All the disabled outputs and inputs, when alarm output polarity (AoP) = oP,
K4 alarm relay will normally remain energised
5.5. Alarms
• All alarms will switch K4 alarm
• The output of K4 alarm relay can be configured from parameter AoP =OP / CL
• The alarm relay only changes when the unit is in alarm state
• All alarms give an error code on the display
• The manually reset of alarms can be done from the keypad; see the procedures for each alarm
when the state changes or from Modbus.
Alarm
Parameters
involved
Enabling conditions Disabling conditions Reset Actions and display
High
temperature
Ctr, ALU,
HHA, ALd,
dAo, tIP
Alarm conditions occur when:
Ctr = tPr (temp control) and
tIP > ALU. Alarm is signalled
if the delays have elapsed:
dAo / ALd
Normal operating condition is restored
when: tIP < ALU - HHA.
Automatic
Alarm is not signalled.
During the alarm, “HA”
message appears on the
display alternated with
standard display.
Low
temperature
Ctr, ALL,
HLA, ALd,
dAo, tIP
Alarm conditions occur when:
Ctr = tPr (temp control) and
tIP < ALL. Alarm is signalled
if the delays have elapsed:
dAo / ALd
Normal operating condition is restored
when: tIP > ALL + HLA.
Automatic
Alarm is not signalled.
During the alarm, “LA”
message appears on the
display alternated with the
standard display.
High
pressure
Ctr, ALP,
HPA, dAP
Alarm conditions occur when:
Ctr = PrS (pressure control)
and B4 > ALP
Alarm is signalled if the delay
dAP has elapsed.
Normal operating condition is restored
when:
• B4 < ALP - HPA
• Press 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
During the alarm, “HP”
message appears on the
display alternated with the
standard display.
High pressure alarm will
open K1 relay and bring
An-out AO1 and AO2 to 0 V.
Fan blocked
Ctr, CMt,
i2F, i2P,
t2d, ton
Alarm conditions occur when:
- Ctr = tPr (temp control)
- CMt = BAF
- i2F = Fan
- ton > t2d
Alarm is signalled after dig-in
2 alarm delay (t2d), after the
digital input is activated.
Automatic disabling: as soon as the dig-in
is disabled, if max 3 activations occur within
4 hours. Manual disabling: it switches from
automatic to manual if 4 activations occur
within 4 hours.
Normal operating condition is restored
when:
- Dig-in is deactivated
- Press DOWN key for 3 sec
- ton < t2d
The alarm is also disabled by:
a. Instrument restart shutdown
b. Cycle of Stand-by/Off followed by restart.
Automatic
Manual
With automatic reset,
“Fan” appears on the
display alternated with the
standard display.
With manual reset, “Fnb”
appears on the display
alternated with the standard
display.
Fan blocked alarm will open
K1 relay and bring An-out
AO1 and AO2 to 0 V.