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31
Variator alarms
Code
Alarm /Alert
Description
Action to be taken
4
Alarm
Mains phase loss
Check the VFD supply voltage and the phase balance (±3%)
7
Alarm
Over voltage
Contact Carrier Service
8
Alarm
Under voltage
Contact Carrier Service
9
Alarm
Inverter overloaded
Check the VFD output current/compressor current
12
Alarm
Torque limit exceeded
Check the VFD output current/compressor current
13
Alarm
Overcurrent
Check the VFD output current/compressor current
14
Alarm
Earth fault
Check if an earth fault exists
16
Alarm
Motor short-circuit
Check if there is a short-circuit at the VFD terminals
23*
Alarm
Internal fan fault
Check the internal fan rotation
29
Alarm
VFD temperature too high
Space temperature too high or VFD ventilation obstructed or damaged
30
Alarm
Motor phase U missing
Check wiring of phase U
31
Alarm
Motor phase V missing
Check wiring of phase V
32
Alarm
Motor phase W missing
Check wiring of phase W
33
Alarm
Inrush fault
Current demand too high: Let the VFD cool down for 20 minutes before starting it again
34
Alarm
Fieldbus communication fault
Check the connections and the shielding of the serial communication cable
36
Alarm
Mains failure
Check the VFD supply voltage and the phase balance (±3%)
38
Alarm
Internal fault
Contact Carrier Service
47
Alarm
24 V supply low
Contact Carrier Service
48
Alarm
1.8 V supply low
Contact Carrier Service
65
Alarm
Control board over temperature
Check the space temperature and the VFD fan
67
Alarm
Option configuration has changed
Contact Carrier Service
68
Alarm
Emergency stop
Contact Carrier Service
80
Alarm
Drive initialized to default value
Contact Carrier Service
95
Alarm
Torque loss
Contact Carrier Service
243
Alarm
IGBT defective
Contact Carrier Service
251**
Alarm
New parts detached
Contact Carrier Service
Variator alerts
Code
Alarm /Alert
Description
Action to be taken
3
Alert
No motor
Check the motor connections
4
Alert
Mains phase loss
Check the VFD supply voltage and the phase balance (±3%)
5
Alert
DC link voltage high
Check the VFD supply voltage and the phase balance (±3%)
6
Alert
DC link voltage low
Check the VFD supply voltage and the phase balance (±3%)
7
Alert
DC over voltage
Contact Carrier Service
8
Alert
DC under voltage
Contact Carrier Service
9
Alert
Inverter overloaded
Check the VFD output current/compressor current
12
Alert
Torque limit exceeded
Check the VFD output current/compressor current
13
Alert
Overcurrent
Check the VFD output current/compressor current
14
Alert
Earth fault
Check if an earth fault exists
23*
Alert
Internal fan fault; Compressor drive:
The drive will be stopped immediately;
Fan drive: The drive continues to
operate.
Check the internal fan rotation
34
Alert
Fieldbus communication fault
Check the connections and the shielding of the serial communication cable
36
Alert
Mains failure
Check the VFD supply voltage and the phase balance (±3%)
47
Alert
24 V supply low
Contact Carrier Service
49
Alert
Motor speed limit exceeded
Contact Carrier Service
59
Alert
Current limit exceeded
Check the VFD output current/compressor current
62
Alert
Output frequency at maximum limit
Check the VFD output current/compressor current
64
Alert
Voltage limit
Supply voltage too low
65
Alert
Control board overtemperature
Check the space temperature and the VFD fan
66
Alert
Heat sink temperature low
Space temperature too low
90†
Alert
Encoder loss
Contact Carrier Service
95
Alert
Torque loss
Contact Carrier Service
96
Alert
Start delayed
Contact Carrier Service
97
Alert
Stop delayed
Contact Carrier Service
98
Alert
Clock fault
Contact Carrier Service
243
Alert
IGBT defective
Contact Carrier Service
247
Alert
Capacity board temperature
Contact Carrier Service
* Error 24 and 104 possible
** Error 70 or 250 possible
† Not applicable to variator size 102
7.6.2 - Drive alarms
Compressor drive alarms or alerts are displayed based on
the following formula: 17+X-YYY for alarms and
35+X-YYY for alerts (X stands for the number of the
circuit and YYY is the alarm/alert code).
Fan drive alarms or alerts are displayed based on the
following formula: 20-YYY to 25-YYY (20=A1, 21=A2,
22=A3 and 23=B1, 24=B2, 25=B3) or alert 38-YYY to
43-YYY (38=A1, 39=A2, 40=A3, 41=B1, 42=B2, 43=B3;
YYY stands for the alarm/alert code).
The tables below present the most common alarms
associated with the variator malfunction. Please refer to
the applicable Danfoss documentation for more
information on other alarms.