Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 74

Parameter Description
[168] Drive in hand
mode
[169] Drive in auto
mode
3 3
[180] Clock Fault
[181] Preventive
Maintenance
[190] No-Flow
[191] Dry Pump
[192] End of Curve
[193] Sleep Mode
[194] Broken Belt
[195] Bypass Valve
Control
72
®
VLT Refrigeration Drive FC 103
The output is high when the frequency
converter is in hand-on mode (as indicated
by the LED light above [Hand On].
The output is high when the frequency
converter is in hand-on mode (as indicated
by the LED light above [Auto on].
The clock function has been reset to
default (2000-01-01) because of a power
failure.
1 or more of the preventive maintenance
events programmed in
parameter 23-10 Maintenance Item has
passed the time for the specified action in
parameter 23-11 Maintenance Action.
A no-flow condition or minimum speed
condition is detected if enabled in
parameter 22-21 Low Power Detection
and/or parameter 22-22 Low Speed
Detection.
A dry pump condition is detected. This
function must be enabled in
parameter 22-26 Dry Pump Function.
A compressor running with maximum
speed for a defined time without reaching
the set pressure is detected. To enable this
function, see parameter 22-50 End of Curve
Function.
The frequency converter/system has turned
into sleep mode. See parameter group
22-4* Sleep Mode.
A broken-belt condition is detected. This
function must be enabled in
parameter 22-60 Broken Belt Function.
The bypass valve control (digital/relay
output in the frequency converter) is used
for compressor systems to unload the
compressor during start-up by using a
bypass valve. After the start command is
given, the bypass valve is open until the
frequency converter reaches
parameter 4-11 Motor Speed Low Limit
[RPM]. After the limit has been reached,
the bypass valve is closed, allowing the
compressor to operate normally. This
procedure is not activated again before a
new start is initiated, and the frequency
converter speed is 0 during the receiving
of start signal. Parameter 1-71 Start Delay
can be used to delay the motor start.
Danfoss A/S © 05/2016 All rights reserved.
Speed
REF
Speed
Min
ON
OFF
ON
OFF
Illustration 3.25 Bypass Valve Control
Principle
[196] Fire Mode The frequency converter is operating in
fire mode. See parameter group 24-0* Fire
Mode.
[197] Fire Mode was The frequency converter was operating in
act. fire mode, but is now back to normal
operation.
[198] Drive Bypass To be used as signal for activating an
external electromechanical bypass,
switching the motor direct on line. See
parameter group 24-1* Drive Bypass.
NOTICE
If enabling the drive bypass function,
the frequency converter is no longer
safety certified (for using the Safe
Torque Off in versions where
included).
[199] Injection Indicates that the digital output is used for
Control providing the injection on-off signal. A low
voltage on the selected digital output
indicates injection off, and high voltage
indicates injection on.
The following options are related to the pack controller.
For wiring diagrams and settings for the meter, see
parameter group 25-** Pack Controller.
[200] Full Capacity All pumps running at full speed.
[201] Compressor 1 One or more of the compressors controlled
Running by the pack controller are running. The
function also depends on
parameter 25-06 Number of Compressors. If
set to [0] No, compressor 1 refers to the
compressor controlled by relay 1, and so
on. If set to [1] Yes, compressor 1 refers to
the compressor controlled by the frequency
converter only (without any of the built-in
relays involved), and compressor 2 to the
compressor controlled by relay 1. See
Table 3.12.
[202] Compressor 2 See [201] Compressor 1 Running.
Running
Time
Time
Stop
Start Time
MG16H202