24
Speed regulation control mode:
To disable speed regulation control for a fixed speed motor, load/unload compressor; select mode ‘0’.
To operate at fixed speeds select mode ‘1’. The motor will operate at the set optimum speed while
loaded, and at the set offload speed when unloaded. The transition in speed is determined by the max
ramp rate.
To operate as a full range variable speed regulated compressor select mode ‘2’.
Maximum Speed set for motor speed at 20mA output
Minimum Speed set for motor speed at 4mA output
Optimum Speed optimum efficiency speed while loaded
Offload Speed
motor speed when off load
P Factor
P&I loop proportional factor
I Factor
P&I loop integration factor
Max Ramp Rate maximum allowed rate of change expressed as % of full speed range per second
(example: max 3000rpm, min 1500rpm, ramp rate 10% = 150rpm/second maximum)
Control Range Percent: Shows the percentage of speed range where set minimum speed is represented
as 0% and maximum speed is 100%. This value is different from the percent speed show in menu page
0.
7. Fault Messages
Faults are abnormal operating condition states. Alarms are fault states that indicate normal operating
conditions have been exceeded but do not present an immediate hazard or potentially damaging condition.
Alarms are intended as a warning only and will not stop the compressor or prevent the compressor from
being started and run.
Start inhibits are fault states that prevent the compressor from initially being starting. Start inhibit faults are
conditions that may present a hazard or damaging situation if the compressor was to be started. A start
inhibit will self reset when the condition being monitored returns to normal operational levels. Start inhibit
conditions are only checked during the initial start procedure and will not stop the compressor once started
and in the ‘started’ state. Start inhibit conditions are not checked during an automated motor start from
Standby.
Run inhibits are fault states that prevent the compressor from starting and running the main motor. Run
inhibit faults are conditions that may present a hazard or damaging situation if the main motor is run. A run
inhibit will self reset when the condition being monitored returns to normal operational levels and the
compressor will then be allowed to exit the standby condition and run without further manual intervention.
Run inhibit conditions are checked prior to a main motor start sequence and will not stop the compressor
motor once started. Run inhibit conditions do not prevent the compressor from entering the ‘started’ state
condition.
Shutdown trip errors are fault states that present a hazardous or damaging condition, the compressor is
stopped immediately. The Shutdown trip error condition must be resolved, and the fault reset, before the
compressor can be re-started.
The different fault state conditions are indicated on the screen with specific codes; the last character
indicating the fault type: E = Shutdown Trip Error, A= Alarm, S = Start Inhibit, R = Run Inhibit. Shutdown trip
errors are divided into two different categories: immediate shutdown errors and controlled stop errors.
Immediate shutdown errors stop the compressor instantly (Emergency Stop button activated for example).
Controlled stop errors stop the compressor in a controlled way using a normal Stop command; the motor will
continue to run for the set stop run-on-time. Immediate shutdown errors have an error code where the first
character is 0 (zero). Controlled stop faults have a “1” as the first character. Alarm faults are also divided into
two different categories: alarms and service alarm messages. Alarms start with a “2”, service alarm
messages with a “4”. Start Inhibit fault codes start with a “3”.
Er
0
0
0
0
E
fault description number
fault type
