151 of 222 pages
Operating and service manual
820
Hevap current ON
Alarm
Description
Evaporator Heater On Current Fault
Cause
Indication of defective heater or defective supply cables to heater
Trouble
shooting
Possible causes:
•
Heaters defect.
•
Heater power cable defect.
Accompanied alarms:
•
N/A.
Trouble shooting:
1) Check the power cable for the heaters for defects. Replace cables if they are
defect.
2) The heater(s) are defect. Dismount the power for the heaters one by one to
find the defect heater, see wiring schematics inside in the controller cabinet.
Replace the defect heater.
Criteria
Evaporator heater has exceeded on current limit
Controller
action
None
Log
X
Alarm
X
Alarm light
Slow flash
Consequence
Test failed
Elimination
Alarm may then be deleted after test completed
Log data
Parm 1
Parm 2
Parm 3
Parm 4
Parm 5
Active/Inactive INom
I1
I2
I3
821
Hevap current OFF
Alarm
Description
Evaporator Heater Off Current Fault
Cause
Indication of defective heater contactor or defective contactor driver circuitry
Trouble
shooting
Possible causes:
•
Defect heater contactor.
•
Defect contactor driver circuit.
Accompanied alarms:
•
N/A.
Trouble shooting:
1) Check the heater contactor for defects. Replace the contactor.
2) Check that the heater power cable are mounted correctly
Criteria
Evaporator heater has exceeded off current limit
Controller
action
None
Log
X
Alarm
X
Alarm light
Slow flash
Consequence
Test failed
Elimination
Alarm may then be deleted after test completed
Log data
Parm 1
Parm 2
Parm 3
Parm 4
Parm 5
Active/Inactive INom
I1
I2
I3