
Operating and service manual
112 of 222 pages
422
I3 over current
Log
Description
I3 Over current
Cause
Indication of short circuit in electric installations of Star Cool unit
Trouble
shooting
See trouble shooting for AL 420
Criteria
Value above upper alarm limit 20 Amp
Controller
action
None
Log
X
Alarm
Alarm light
Off
Consequence
Unit stops
Elimination
Log data
Parm 1
Parm 2
Parm 3
Parm 4
Parm 5
Active/Inactive
High limit
Present
A/D Channel
This alarm is used for service purposes. The fuses are protecting the unit
423
No phase direction
Fatal
Alarm
Description
Phase direction not detectable
Cause
Phases may be lacking or there may be extremely high noise in one or more
phases in the detection moment
Trouble
shooting
Possible causes:
• The unit is supplied with an unstable voltage.
• The voltage is unstable/unmeasurable.
• The power frequency is out of specified range.
• Loose flat cable between power meas PCB and terminal PCB
• Defect Power Meas PCB
Accompanied alarms:
• AL 424 may also be active.
Trouble shooting:
1) Check or/and replace flat power cable between power meas PCB and
terminal PCB.
2) Check if voltage on all 3 phases is within specified range.
3) Verify that all 3 phases are applied to the unit.
4) Verify that power frequency is within specified range.
5) Verify that correct voltage is applied to the unit
6) Check/replace power meas PCB.
7) If 1) to 6) are ok, then replace the controller door or set the correct phase
direction on the Configuration menu F05 to
c
lock
w
ise or
c
ounter
c
lock
w
ise.
Criteria
Impossible to detect phase sequence in power supply
Controller
action
Controller breaks supply
Log
X
Alarm
X
Alarm light
Quick flash
Consequence
Unit stops
Elimination
Alarm will be marked as inactive in alarm list when phase sequence can be established.
Alarm may then be deleted.
Log data
Parm 1
Parm 2
Parm 3
Parm 4
Parm 5
Active/Inactive No. of CW
No. of CCW Min. no. OK