Download Control System for Air-Handling Units

Control System for Air-Handling Units
Control and Signalling of Operation
Operation via QAA27 controller – enables
correction of the desired room temperature
(basic setpoint of desired temperature for
heating or cooling) ±3 K (°C). The correction made via the QAA27 controller can be
displayed on the web interface – in the
menu "Monitor" >> ["Temperatures"].
Operation via HMI controller (Human
Machine Interface) – enables (protected
by a password) complex control and monitoring of device operating parameters
similarly to the web interface (but with
significantly reduced comfort – only text
interface without help statistics, etc.)
Refer to "HMI Controller Operating Instructions".
The HMI controller can also be used as a service control
if control via LAN is not available.
Operating Signalling
WebClima web interface
The operating mode is signalled in the window below the
basic control buttons (see fir. # 24) and by related colour
stripes (virtual LEDs) showing the state of the fan(s) and
failures (failure output).
The signal stripes can change to these colours to signal:
n Green … the fan(s) are running.
n Red … the fan(s) are stopped.
n Orange … failure (alternately with red or green colour).
Warning
Sometimes, some failures during operation or after turning
the device (fans) off cease themselves, respectively they
are not active (resp. not evaluated), but the failure state
of the component as well as the failure state as general
will be signalled by the yellow stripe flashing until the
failure is manually reset. This state is purposely secured
by the failure state memory because it is necessary to
check and remove possible reasons for the failure, and
deliberately confirm the faultlessness of the device by
quitting the failure alarm.
The failure logs can be displayed in the menu "Statistics"
>> ["History of events-errors"].
Optionally, if error e-mail messaging is enabled (refer to
"E-Mail Configuration") you can find them in the reserved
e-mail box
Note: Related parameters of all signalled information can
be found in WebClima menus, respectively in the information panel. Temperature mode and output below the
graphical control buttons of operating modes (refer to the
description of the WebClima desktop) are not signalled
by specific visual information, but the information can be
found in the menu, respectively the infopanel – a structured parameter file below the buttons of operating modes.
ORe1 Controller
The signalling is ensured by the LEDs in pictograms:
n Operating mode (Stop-Manual-Program) – if it is activated via the ORe1 controller.
n Operation of fans
n Failures
Refer to Ore1 "Operating Instructions" (included in the
delivery).
HMI Controller
The signalling is ensured by the LED buttons:
Operation of fans (green LED flashes, F3 button).
Failure (the red LED is on, F3 button).
Further information accessed via menus, refer to "HMI
Controller Operating Instructions".
QAA27 Controller
It does not provide visual signalling of operating modes; it
just shows the temperature correction on its knob scale.
Failures
The WebClima control unit monitors, evaluates and informs on various types of system failures.
The failures are signalled, see the article above; orange
in the web interface, red on the HMI controller and text
at the bottom of the right panel (if the failure signalling is
not switched off in the menu "Connection" >> ["WebClima
interface"]). Failures are also listed in the menu: Monitor"
>> ["Current failures"].
The last 15 failure events are saved in the device memory (failure start and end); they can be displayed in the
menu "Statistics" >> ["History of events-errors"] (refer
to "History of Events-Errors"; ceased failures, refer to
Warning above).
Error messages include object identification, i.e. the components identified as faulty, which must be checked for
failure reasons before quitting the failure state.
The failure reset, refer to "Failure Reset".
For further specific information, refer to "Administration/
Checks, Statistics, and E-Mail Configuration".
Failure (Digital) Outputs
VAll important components of the air-handling unit (fan
motors, electric heaters, etc.) are equipped with failure
outputs (contacts) which after being connected to the correspondent inputs (contacts) are monitored and evaluated
by the WebClima control unit, respectively by the controller.
If a failure occurs (fault state of the contact) the alarm is
automatically activated in accordance with the internal
algorithm – while simultaneously indicating the faulty object and if necessary (serious failure) stopping the device.
The failure states can also be checked in the menu
"Checks" >> ["Error inputs"]. Individual parameters in
this submenu display the immediate state of digital failure
inputs to the controller in any mode. For more information,
refer to "Checks, Failures, Statistics, Failure states".
Note: In the stop mode (at the beginning of start up) the
sensors of the air flow and filter fouling signal the actual
state of contacts, which in this working mode equals a failure state (contacts are opened). Under such circumstances,
the system does not evaluate this state as a failure (the
evaluation is carried out after expiration of the delay time
which has been set in the menu).
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