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Param
eter
Me
nu
Value
rang
e
Def
ault
U
nit
Description
Fan off
by al. X
3-2-
2-1
Y/N
Y
- Setting = YES
If any fault is detected while the fan is running, the fan output is switched off, the relevant fan stage
in the system configuration is deactivated and an alarm is signalled. The fan fault cannot then be
acknowledged until the fan is enabled again in the system configuration.
In the case of speed control, no deactivation of the outputs is performed. In the case of parallel
combined control, no shutdown of fan stage 1 and no disable in the system configuration are
performed.
•
Switch off fans when motor overload cut-out is tripped
•
Cancellation of the fan enable (menu 3-1)
Note: The motor protection alarm cannot be acknowledged until the enable of the fan has been
granted again (menu 3-1)
Setting = NO
An alarm is signalled if any fault is detected while the fan is running. The alarm can be
acknowledged:
•
if the motor protection input of the relevant fan is carrying voltage again
•
after a power failure
•
after a fan standstill of two hours
Mon.O
FF
w.Fan
3-2-
2-1
Y/N
Y
- This parameter defines whether the fan should be monitored during operation
and
during standstill
or only during operation. For example, the function is required to shut down EC fans for a capacity
reduction without signalling an alarm.
Setting = YES
There is always an error message if the motor protection of any fan trips.
For some types of system
(e.g. fans in parallel on one output), the fan output must also stay activated after tripping of the
motor overload cut-out. Therefore the reset of the fan output in the event of a fault can be
deactivated using the parameter
Mon.OFF w.Fan
= NO
(menu 3-2-2-1). If the parameter is set to YES,
the relevant fan output is reset when the corresponding motor protection trips.
In the parallel
combined control operating mode, the fan output 1 is not reset in the case of tripping of the motor
overload cut-out of the fan stage 1.
Note:
Fans in standstill are not monitored for their motor protection if the parameter is set to YES.
Setting = NO
The control action is also dependent on the
Mon.OFF w.Fan
parameter.
5.12.8 Monitoring of the fan speed controller
If the fan control is performed using a speed controller / frequency converter, this can be monitored during
combined control via the input stage
No. cond. 1
. In the case of a fault, the fan output 1 for enable of
the speed controller is reset and instead the relay output of the fan stage
No. cond.stages
+ 1
is set so that
emergency operation is possible.
5.12.9 Monitoring of the compressor speed controller
The frequency converter (speed controller) is monitored via the digital input 15 (terminals 78/79) of the
controller. If there is no voltage at the input,
•
the FC compressor is switched off and is no longer available for capacity regulation
•
the message is transmitted after a configurable time delay according to the preselected priority
Summary of Contents for VS 3015 C
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