Fault
num-
ber
Alarm/
warning
bit num-
ber
Fault text
Warn-
ing
Alarm
Trip
locked
Cause of problem
92
–
No-Flow
X
X
–
A no-flow condition has been detected in the system.
Pa-
rameter 22-23 No-Flow Function
is set for alarm.
93
38
Dry pump
X
X
–
A dry-pump condition has been detected in the system.
Parameter 22-26 Dry Pump Function
is set for alarm.
94
39
End of curve
X
X
–
An end-of-curve condition has been detected in the sys-
tem.
Parameter 22-50 End of Curve Function
is set for
alarm.
95
40
Broken belt
X
X
–
Torque is below the torque level set for no load, indicat-
ing a broken belt. See
parameter group 22-6* Broken Belt
Detection
.
99
–
Locked rotor
–
X
X
The rotor is blocked.
101
–
Flow/pressure
Info Missing
–
–
–
Sensorless-pump table is missing or wrong. Download
sensorless-pump table again.
126
–
Motor Rotat-
ing
–
X
–
High back EMF voltage. Stop the rotor of the PM motor.
127
–
Back EMF too
high
X
–
–
This warning applies to PM motors only. When the back
EMF exceeds 90% x U
invmax
(overvoltage threshold) and
does not drop to normal level within 5 s, this warning is
reported. The warning remains until the back EMF returns
to a normal level.
159
36
Check valve
failure
X
–
–
When the drive is not in operation, a broken check valve
leads to the motor runs in reverse.
200
–
Fire mode
X
–
–
Fire mode has been activated.
202
–
Fire mode lim-
its exceeded
X
–
–
Fire mode has suppressed 1 or more warranty voiding
alarms.
250
–
New spare
part
–
X
X
The power or switch mode power supply has been ex-
changed (on 400 V, 30–90 kW (40–125 hp) units). Contact
the local Danfoss supplier.
251
–
New type
code
–
X
X
The drive has a new type code (on 400 V, 30–90 kW (40–
125 hp) units). Contact the local Danfoss supplier.
5.2 LCP Errors Messages
LCP errors are not warnings or alarms. They do not affect the operation of the drive. An LCP error example on the LCP is shown in
the following illustration.
e3
0b
u7
94
.1
0
0-**: Operation / Dis
1-**: Load and Motor
Button disabled
Illustration 19: LCP Error Example
AQ367426199594en-000101 / 130R0988 | 43
Danfoss A/S © 2021.06
Warnings and Alarms
VLT® HVAC Drive FC 131
Operating Guide
Содержание VLT HVAC Drive FC 131
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