Mitsubishi Electric s-MEXT-G00 006, Technical Manual

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TM_s-MEXT_ME28relC_00_12_19_EN
Technical manual
TRANSLATION OF THE ORIGINAL INSTRUCTIONS 64
2.8 EVENTS MASKS
Press the [ALARM] key once to enter the “Alarm” menu and view the event messages along with their codes.
If there is more than one event, scroll the menu using the [UP] and [DOWN] keys. Press any other button to exit this menu.
In order to reset an event, press the [ALARM] key another time. The event will be reset only if the condition that caused it has been solved. The event otherwise remains
active.
By pressing the
[ALARM] key, no events being there for display, the system shows the message “No Alarm detected”.
For every type of alarm, the following properties are defined:
•
Type of Event: Reports the presence of a Signal (S) or an Alarm (A).
•
Type of Reset: Indicates whether reset is Manual or (MANUAL) or Automatic (AUTO).
•
Location: Reports where in the unit the alarm has taken place.
• Action: Indicates where the block caused by the alarm is located.
With regard to the Type, the parameters of some events may be set and it is possible to define whether the reset should be Manual or Automatic, as well as define the
maximum number of interventions after which the alarm will automatically switch to Manual reset.
2.8.1 Events table
Letters Display description Description
Key to “Type of Event” column
A A### Alarm with resource/unit block. Sets the “alarm cumulative”.
S S### Display signal. Does not set the “alarm cumulative”.
S/A
S###
A### Signal or Alarm. One mode or the other may be selected from the parameter. The “alarm cumulative” is set in the case
the event is an alarm.
S* S### Display signal with “alarm cumulative” setting.
Key to Type of Reset” column
A Type:AUTO Automatic rearm (if the condition causing the alarm disappears, the alarm resets automatically).
M
Type:MANUAL
Manual rearm (if the condition causing the alarm disappears, the alarm must be reset from the keyboard).
A/M
Type:AUTO
Type:MANUAL
Automatic reset if the type of reset set in the parameter is automatic.
Manual reset if the type of reset set in the parameter is manual.
A->M
Type:AUTO
Type:MANUAL
Automat ic rearm alarm for the first “N” interventions, then manual.
Key to “Position” column
CO Location:COMPR Alarm / Signal involving the compressor.
CI Location:CIRC Alarm / Signal involving the cooling circuit.
U Location:UNIT Alarm / Signal involving the unit.
P Location:PLANT Alarm / Signal involving the system
Key to “Action” column
NO No block.
U Action:UNIT Unit block.
NO/U
Action:UNIT
No Block if the type of reset set in the parameter is automatic.
Block of the unit if the type of reset set in the parameter is manual.
CI Action:CIRC Block of the cooling circuit involved in the event.
CO Action:COMPR Block of the compressor involved in the event.
HU Action:HU Block of the humidifier.
EH Action:EH Block of the electric heater or heat resource involved in the event.
FN Action:FN Block of the function involved in the event.
Key of the “Action” column for the “Function” category
FC
Not
Displayed
Block of the Free Cooling function
FC Ind Block of the Indirect Free Cooling function (FC unit).
Lim Block of the function regarding the output air temperature limit.
HU Block of the humidity control function.
DH Block of the dehumidifier control function.
The descriptions and codes of the events are given on the following pages.