111
VFD ALARMS AND ALERTS — Alarms and alerts asso-
ciated with the VFD function follow a different naming con-
vention than general unit faults. These alarms and alerts can be
viewed and reset following the procedures outlined in the sec-
tions Current Alarms and Resetting Alarms on page 100.
Table 75 lists the VFD alarm and alert naming conventions,
while Tables 76 and 77 list the Danfoss codes associated with
the alarms and alerts. These represent the most common alarms
and alerts associated with VFD malfunction. Refer to the ap-
propriate Danfoss documentation for more information on oth-
er alarms.
Table 75 — VFD Alarm/Alert Naming Conventions
* The Danfoss Alarm/Alert code is represented by nnn. See Tables
76 and 77.
Table 76 — VFD Alarms
LEGEND
VFD ALARMS AND ALERTS
ALARM
FORMAT*
ALERT
FORMAT*
Compressor A
17nnn 35nnn
Compressor B
18nnn 36nnn
Fan A1
20nnn 38nnn
Fan A2
21nnn 39nnn
Fan B1
23nnn 41nnn
Fan B2
24nnn 42nnn
ALARM CODE DESCRIPTION ACTION TO BE TAKEN
002 Live zero fault Contact Carrier Service
004 Mains phase loss Check the VFD supply voltage and the phase balance (±3%)
007 Overvoltage Contact Carrier Service
008 Undervoltage Confirm supply voltage matches VFD nameplate voltage, Contact Carrier Service
009 Inverter overloaded Check the VFD output current/compressor current
010
Motor overtemperature Check parameter 1-90 and confirm setting is [0], check motor temperature, Contact Car-
rier Service
011
Motor thermistor Check parameter 1-90 and confirm setting is [0], check motor temperature, Contact Car-
rier Service
012 Torque limit exceeded Check the VFD output current/compressor current, Contact Carrier Service
013
Overcurrent Check VFD output current/compressor current, Confirm the motor size matches the VFD
nameplate, check parameters 1-20 and 1-25 for correct motor data, Contact Carrier Service
014 Earth fault Check if an earth fault exists
016 Motor short-circuit Check motor and motor wiring for short-circuit
017 Serial communication timeout Check the connections, shielding and termination resistors on the communication wiring
023
Internal fan fault Check for proper fan operation, cycle power to the VFD and confirm that fan operates at
start-up
025 Brake resistor short-circuited Contact Carrier Service
026 Brake resistor power limit Contact Carrier Service
028 Brake verification Contact Carrier Service
029 VFD temperature too high Ambient temperature too high, VFD ventilation fans not working or obstructed
030 Motor phase U missing Check wiring of phase U
031 Motor phase V missing Check wiring of phase V
032 Motor phase W missing Check wiring of phase W
033
Inrush fault Current demand too high, too many startup attempts in short period of time, allow VFD to
cool for 20 minutes before attempting another start-up
034 Fieldbus communication fault Check the connections, shielding and termination resistors on the communication wiring
036 Mains failure Check the VFD supply voltage, fuses and the phase balance (±3%)
038 Internal fault Contact Carrier Service
047 24 V supply low Contact Carrier Service
048 1.8 V supply low Contact Carrier Service
057 AMA timeout Contact Carrier Service
065
Control board overtemperature Check the ambient temperature and the VFD fan for proper operation and fan filters
(where applicable) for clogging
067 Option configuration has changed Contact Carrier Service
068 Emergency stop Contact Carrier Service
071 PTC 1 emergency stop Contact Carrier Service
072 Emergency stop Contact Carrier Service
080 Drive initialized to default value Contact Carrier Service
094 End of curve Contact Carrier Service
095 Torque loss Contact Carrier Service
243 IGBT defective Contact Carrier Service
251 New parts detached Contact Carrier Service
AMA — Automatic Motor Adaptation
IGBT — Insulated Gate Bipolar Transistor
PTC — Positive Temperature Coefficient
VFD — Variable Frequency Drive
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