WSPC USER INTERFACE  Part 1: User Level 
24 
High Air Filter dP – Air filter pressure differential is high indicating that the air 
filter unit needs to be checked or changed. 
High Temperature 1, 2, or 3 – Compressor Temperature at the specified temp 
probe location is approaching the set high limit.   
Low Temperature 1, 2, or 3 – Compressor Temperature at the specified temp 
probe location is approaching the set low limit. 
Power Interruption – An interruption in power to the compressor has occurred. 
Sequence Comm Error – Communication problem exists between the 
compressor controllers set up for sequential operation. 
User Warning – A user furnished switch has been activated. 
Low Computer Battery – Indicates that the controller internal battery is low and 
needs to be replaced. 
Dryer Warning – Indicates that the compressor system dryer needs to be 
serviced. 
Refer to the WS Controller Instruction Manual for additional instructions on 
actions to be taken when warning conditions exists.  
3.5.2 Service Reminders 
Service Reminders may inform the user that a particular component of the 
compressor is recommended for servicing.   An Administrator may set service 
intervals and reset the service reminders.  The following service reminders can 
appear under the “Recommended Service” heading: 
Oil (Fluid) Filter Change – The compressor fluid filter life interval has expired. 
Change the fluid filter within the time frame noted in the machine operation 
specifications. 
Separator Change – The compressor fluid separator life interval has expired. 
Change the separator within the time frame noted in the machine operation 
specifications. 
Air Filter Change – The compressor air filter life interval has expired. Change 
the air filter within the time frame noted in the machine operation specifications. 
Oil (Fluid) Analysis – Fluid analysis interval has expired.  Schedule the 
compressor fluid analysis per machine operation specifications. 
Oil (Fluid) Change – The compressor fluid life interval has expired. Change the 
compressor fluid within the time frame noted in the machine operation 
specifications.  
Other Maintenance – Other periodic maintenance should be performed as 
scheduled per machine operation specifications. 
The “Interval” fields show the recommended hours remaining until the next 
servicing is due for the above listed items.  A zero value indicates the reminder is 
disabled.