Ingersoll-Rand Intellisys SSR 10-40, Руководство для обслуживающего персонала

Страница: 53 / 107

STARTER FAULT - ALARM
Reasons for the Alarm:
Star Delta Starters
1. Incorrect Starter Function.
a. Loose wiring.
b. Bad starter coil.
c. Foreign material.
d. Damaged or welded contacts.
e. No output 110 Voltage to starter coils from BTS - 1 terminals 27-28 M1
coil. Terminal 24-23 IS coil when the start button is pushed. (Starter
coil wiring must be connected.)
f. Faulty auxiliary contact.
2. Mechanical High Air Temperature switch opens.
3. Faulty Emergency Stop Button contact opens the 115 Volt AC circuit and
5 Volt DC circuit stays engaged.
4. Optional Phase monitor alarm condition. (Reverse phase for correct
rotation.)
5. Jumper loose or missing on BTS-1 Terminal strip at terminal 29 or 30.
6. Loose wiring.
7. Bad Output on interface board. (Reference 1e. above.)
8. Damaged cable from controller and starter interface board affecting the
output voltage at BTS-1 or reading of the auxiliary contact position.
NORMAL OPERATION
When the start button is pushed 1 M and 1 S contactor engage. After 2 seconds
the controller logic looks to see if the auxiliary contacts on 1M and 1S are closed.
If they are open the unit will shutdown. After the 10 second minimum transition
time 1S drops out and 1S auxiliary contacts are monitored for the open position
or the unit will shutdown. One second is allowed for 1S auxiliary contact to open
or shutdown will occur. 2M contactor is energized. 2 seconds is allowed before
2M auxiliary contacts are expected to be closed.
Once the compressor is running any item under “REASON FOR ALARM” will
shut the unit down.
TROUBLESHOOTING
BTS 1 Terminal Strip
1. If 1M or 1S pull in, the following components can be assumed good.
a. E - Stop
b. High Air Temperature Switch
c. Jumper 29 and 30 on BTS - 1.
2. Check wiring at terminals 29 and 30 BTS - 1.
3. Between terminal 29 and ground should have 110 Volts.
4. Check BTS - 1 Terminals 23 - 28 Trace wiring to main coils.
5. If partial transition, troubleshoot auxiliary contacts.
6. If contactors chatter, suspect low secondary voltage.
7. Check high air temperature switch. (1 TAS).
ALARM
CHECK INLET CONTROL SYSTEM
This alarm is activated when the small tab on the drive coupling for the inlet air
valve has not properly engaged the “open” and “closed” limit switches located
on the Stepper Limit board. These two inlet valve positions are used as
reference points by the Intellisys Controller logic and the alarm can occur both
before and after starting the compressor.
Before Starting Activation
Activation of the Check Inlet Control System alarm can happen or the moment
the incoming power is applied to the unit or after any alarm condition has been
reset.
This alarm activation results as the Intellisys Controller makes a physical check
of the two Stepper Limit switches prior to starting the compressor and one of the
switches was not properly engaged.
After Starting Activation
Activation of the Check Inlet Control System alarm can happen only after the
Star-Delta transition has been completed and either of the following conditions
is experienced.
A) When the unit is first loaded in either On/Off line or Mod/ACS mode and the
“open” limit switch for the Stepper Motor was not properly engaged when the
unit air valve went fully open.
B) If the compressor has been running loaded and the Unload or Unloaded
Stop button is pressed and the inlet valve coupling does not properly
engage the “closed” limit switch as the inlet air valve closes.
There are several checks with the power OFF and the power ON that can be
made to locate problem components that activate the Check Inlet Control
System alarm.
-49- -50-