33
IOM_ACVBA-ACVA_351a2402_207958_180109_EN
ACVBA-ACVA
PACKAGED VERTICAL COMPACT UNITS
AIR-AIR
OPTIONAL
EC MOTOR FANS
Diagnosis / Faults
Status Out with flash code
LED Code
Alarm relay K1 *
Cause (Explanation)
Reaction of Controller (Solution)
OFF
de-energized, 11 - 14
interrupted
No line voltage
Line voltage available?
Unit switch OFF and automatically ON
when the voltage has been restored
ON
energized, 11 - 14
bridged
Normal operation without fault
1x
energized, 11 - 14
bridged
No enable = OFF
Switch-off
digital input or Bus
2x
energized, 11 - 14
bridged
Active temperature management
The device has an active temperature
management to protect it from damage
due to too high inside temperatures. In
case of a temperature rise above the
fixed limits, the modulation is reduced
linearly. To prevent the complete system
being switched off externally (in this
operation permissible for the controller)
in case of reduced operation due to too
high an internal temperature, no fault
message is sent via the relay.
With a drop in temperature the modulation rises
again linear.
Check installation of the device and cooling
of the controller.
3x
de-energized, 11 - 14
interrupted
HALL-IC fault
Incorrect signal from the Hall-ICs, error
in the commutation.
Internal plug connection faulty.
The controller switches the motor off. Automatic
restart if no faults are recognized
Replace fan / motor
4x
de-energized, 11 - 14
interrupted
Line failure (only for 3~ types)
After a power failure and if the voltage is correct,
there will be a start attempt after approx.. 15 sec.
That will occur until the 3 phases are available again.
Control the power supply
5x
de-energized, 11 - 14
interrupted
Motor blocked
If after 8 seconds of commutation no
speed is measured > 0, the fault
“Motor
blocked” is released.
EC-Controller switches off, renewed attempt to start
after about 2.5 sec.
Final shutoff, when fourth starting test fails.
It is then necessary to have a reset by dis-
connecting the line voltage.
Check if motor is freely rotatable.
6x
de-energized, 11 - 14
interrupted
IGBT fault
Short circuit to earth or short circuit of the
motor winding.
EC-Controller switches off, renewed attempt to start
after about 60 sec.Code 9.
Final shut off, if following a second starting test
a second fault detection is detected within a period of
60 seconds.
It is then necessary to have a reset by dis-
connecting the line voltage.
7x
de-energized, 11 - 14
interrupted
DC under voltage
If the DC-link voltage drops below a
speci
fied limit the device will switch off.
If the DC-link voltage rises above the limit within
75 seconds, then the controller will attempt to start.
