MALFUNCTIONS / TROUBLESHOOTING ENGLISH Translation of the Original
40
454522.68.07-01-E
27.06.2012
14 MALFUNCTIONS
/
TROUBLESHOOTING
Caution!
• The safety notices contained in Chapter 1 must be complied with!
The basis for troubleshooting are the circuit diagram, the flow diagram and the messages displayed
on the control panel. The controlled variable is the main setpoint.
Displays on the Control and Operating Unit
See Chapter Operation of the Control and Operating Unit.
14.1 Malfunctions / Troubleshooting of Control and Operating Unit ST 181
Fault display in the event of a malfunction:
F1 -F23 will flash in alternation with the display of the actual value.
Acknowledging/resetting alarm messages on the control panel
After the fault has been eliminated, reset this alarm message by pressing the (buzzer) button:
− Press 1x (buzzer off)
− Press 2x (buzzer and fault RESET)
Fault Display Malfunction / Cause Remedy
F1
Motor fault, pump
Motor protecting switch has tripped
- Pump motor overloading due to
mechanical sluggishness
Check pump, replace if necessary
Place motor protecting switch in
position-1-
Motor fault, compressor
Motor protecting switch has tripped
- Compressor motor overloading due
to mechanical sluggishness
Check compressor, replace if
necessary. Place motor protecting
switch in position -1-
F2
- Motor overloading due to phase
failure
Correct phase failure. Place motor
protecting switch in position -1-
Motor fault, condenser fan
Motor protecting switch or thermal contact
has tripped
- Fan motor overloading due to mechanical
sluggishness
Check fan, replace if necessary. Place
motor protecting switch in position -1-
- Motor overloading due to phase failure Correct phase failure. Place motor
protecting switch in position -1-
F3
-
Thermal contact of a fan has tripped,
motor winding overheated
Check thermal contact for continuity,
allow motor to cool, replace if necessary;
move motor protecting switch in position -
1-
Fault Display Malfunction / Cause Remedy
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