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maintenance
warning
compressor overhaul has
expired.
S.21
Warning
Air Filter
Warning
The digital input for the
air filter vacuum has
tripped. The air filter is
blocked and has created
excessive vacuum at the
inlet to the compressor
Change the air filter and reset the air filter
maintenance timer when the change is complete.
S.22
Warning
Oil Filter
Warning
The digital input for the
oil filter differential
pressure has tripped.
The oil filter is blocked or
defective.
Change the oil filter and reset the oil filter
maintenance timer when the change is complete.
S.25
Warning
External
maintenance
warning
The digital input
programmed for external
maintenance warning
has tripped.
Service the external device.
S.30
Fault
Change
Separator fault
The differential pressure
across the separator
element has exceeded
the fault limit. The
separator element needs
to be serviced.
Change the separator element and reset the
separator maintenance timer when the change is
complete.
S.30
Warning
Change
Separator
Warning
The differential pressure
across the separator
element has exceeded
the warning limit. The
separator element needs
to be serviced.
Change the separator element and reset the
separator maintenance timer when the change is
complete.
Sequencing Alarms
SQ.0
Warning
Sequencing
communication
error warning
Problem with the
communication wiring or
connection to the
controller.
Check the cable and wiring connection to the
controller or IO brick, depending on protocol, to
verify no loose wires or connectors. Make sure
each of the compressors in the sequence are
wired properly and the controller sequencing
settings are correct.
SQ.1
Warning
Sequencing
duplicate unit
number warning
The Unit number
assigned in the
sequencing menu is
identical to another
machine in the
sequence.
Change the unit number in the sequencing
settings menu of the device to an unused value,
either the next number in the sequence or the
missing number.
SQ.2
Warning
Sequencing no
Compressor
detected
warning
No available
compressors in
sequence. Connection
may have been disrupted
between compressors.
Check the communication wiring from the master
machine to each of the slaves to ensure
connection is secure and there are no loose
wires. Confirm the sequencing settings in the
controller. Refer to the sequencing manual for
more information. Power cycle controller if
connections and settings are correct.
VFD1 Alarms
V1.1
Warning
VFD1 Over
Current warning
VFD is measuring
excessive current to the
motor. Motor current is
approaching the fault
limit to run the
compressor.
Check wiring between motor and VFD for
incorrect or loose connections. Check drive
system for proper alignment and wear. Verify
supply voltage within tolerance. Decouple
compressor from drive motor and check for
proper manual rotation. Test motor insulation
resistance.