Danfoss VLT AHF 005 User Manual

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9.4.33 WARNING/ALARM 35, Option Fault
Cause
An option alarm is received. The alarm is option-specific. The most likely cause is a power-up or a communication fault.
9.4.34 WARNING/ALARM 36, Mains Failure
Cause
This warning/alarm is only active if the supply voltage to the drive is lost and parameter 14-10 Mains Failure is not set to [0] No Func-
tion.
Troubleshooting
Check the fuses to the drive and mains supply to the unit.
9.4.35 ALARM 37, Phase Imbalance
Cause
There is a current imbalance between the power units.
9.4.36 ALARM 38, Internal Fault
Cause
When an internal fault occurs, a code number defined in
Table 96 is shown.
Troubleshooting
Cycle power.
Check that the option is properly installed.
Check for loose or missing wiring.
It may be necessary to contact the Danfoss supplier or service department. Note the code number for further troubleshooting direc-
tions.
Table 96: Internal Fault Codes
Number
Text
0
The serial port cannot be initialized. Contact the Danfoss supplier or Danfoss service department.
256–258
The power EEPROM data is defective or too old. Replace the power card.
512–519
Internal fault. Contact the Danfoss supplier or Danfoss service department.
783
Parameter value outside of minimum/maximum limits.
1024–1284
Internal fault. Contact the Danfoss supplier or Danfoss service department.
1299
The option software in slot A is too old.
1300
The option software in slot B is too old.
1302
The option software in slot C1 is too old.
1315
The option software in slot A is not supported/allowed.
1316
The option software in slot B is not supported/ allowed.
1318
The option software in slot C1 is not supported/ allowed.
1379–2819
Internal fault. Contact the Danfoss supplier or Danfoss service department.
1792
Hardware reset of digital signal processor.
1793
Motor-derived parameters not transferred correctly to the digital signal processor.
1794
Power data not transferred correctly at power-up to the digital signal processor.
1795
The digital signal processor has received too many unknown SPI telegrams. The AC drive also uses this fault code if
the MCO does not power up correctly. This situation can occur due to poor EMC protection or improper grounding.
AQ262141314214en-000301 / 130R0880142 | Danfoss A/S © 2021.11
Maintenance, Diagnostics, and
Troubleshooting
VLT® HVAC Drive FC 102
Operating Guide

Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English