9.0 OPERATING INSTRUCTIONS
IRN37–160K–CC & IRN50–200H–CC & IRN75–160K–2S & IRN100–200H–2S
65
9.15 ALARMS
When an Alarm occurs, a large exclamation mark in a
triangle will flash on the display screen. The display
message will indicate what caused the Alarm.
The compressor will stop and cannot be re–started
again until the alarm condition no longer exists and the
alarm message reset.
Pressing the STATUS button will display the STATUS
screen. The presence of the ALARM button indicates
that an Alarm condition still exists. Alarm Status is the
list of machine operating conditions that existed at the
time of the Alarm.
The name and value of each of the items listed can be
seen by moving the list up and down using the arrow
buttons. Pressing the ALARM button will return the
display to the Alarm screen and the RESET button.
The Alarm needs to be reset by the operator by
pressing the RESET button twice. Any exceptions to
this are explained in the alarm descriptions.
–ALARM STATUS–
100
PACKAGE DISCH
PRESSURE
100 psi
STOPPED BY
ALARM
PACKAGE DISCHARGE
TEMP
103
_
F
ALARM
MAIN MENU
The possible Alarm messages are as follows;
EMERGENCY STOP– This will occur if the Emergency
Stop button is engaged. The button must be
disengaged before the alarm can be cleared.
BLOWER –FAULT– This will occur if a blower fault is
sensed.
HIGH AIREND DISCH TEMP– This will occur if the
airend discharge temperature is greater than 109
_
C
(228
_
F).
REMOTE START FAILURE– This will occur if the
Remote Start button is pressed after the machine is
running or if the Remote Start button remains closed.
REMOTE STOP FAILURE– This will occur if the
Remote Stop button remains open and either Start
button is pressed.
SENSOR FAILURE – This will occur if a sensor is
recognized as missing or broken.
VSD FAULT – The VSD fault is read from the drive. The
Intellisys will read the status menu of the variable speed
drive. If a fault condition is returned in the status
information, the Intellisys will issue a VSD FAULT alarm
and display the number of the fault condition.
CONTROL POWER LOSS – This will occur if the
control circuit is broken by a bad connection or safety
switch (e.g. HAT Switch/ Phase Monitor).
Any fall of voltage below 100VAC for more than
2 seconds will cause this alarm trip.
STOP FAILURE – This will occur if the compressor
should be stopped but the motor is still running above
minimum speed 4 seconds after the stop signal is given.
HIGH START PRESSURE – If the sump pressure is
above 100 psi (6.9 bar) when the compressor starts, the
Intellisys will open the blowdown valve during the first
few seconds of starting (3 to 7 seconds). If the sump
pressure does not fall to 100 psi (6.9 bar) during that
time period, this shutdown will occur.
CHECK MOTOR ROTATION – This will occur if the
Intellisys reads a negative speed from the VSD when
starting .
VSD COMMUNICATION FAILURE – This will occur if
the Intellisys does not receive a response from the VSD
when requesting information. This alarm will take about
8 seconds to occur.
VSD INITIALIZATION FAULT – Will occur if the
Intellisys is unable to establish communications with
the VSD after a power up.
LOW SUMP PRESSURE – Will occur if the
compresssor is operating at or above the minimum
speed and the sump pressure drops below 15psi (1.03
bar) for 15 seconds.
REPLACE COOLANT FILTER – This will occur if the
coolant filter is blocked and requires changing.
INCORRECT VSD TYPE – Will occur at power up if the
VSD type does not match the size of the compressor
125HP (90kW) machines and above also have the
following alarm messages;
CONTROL POWER LOSS – This will occur if the
compressor should be running and the AC input
voltage, as read from the VSD, falls below 100 VAC.
There is a delay of 2 seconds on this alarm in case the
power quickly returns. An open HAT switch or phase
monitor are two things that can cause this alarm.
STOP FAILURE – This will occur if the compressor
should be stopped, but the motor speed has not
dropped below the minimum motor speed setpoint. The
Intellisys will wait 4 seconds for the compressor to stop
before issuing this alarm.
HIGH INTERSTAGE PRESSURE – If the interstage
pressure is over 100psi while the unit is running and the
unit is a 2–stage.
