Preventive Maintenance - McQuay WSC Operating Manual

Fault
Code
F81
F82
F94
F95
F96
F97
F98
F99

Preventive Maintenance

During Commissioning
• Torque all power connections during commissioning, including pre-wired equipment.
• Check all control wiring for loose connections.
After First Month of Operation
• Re-torque all power connections, including pre-wired equipment annually.
• Clean accumulated dust with clean compressed air.
• Inspect cooling fans every three months.
• Clean or replace air vent filters every three months.
82
Description
Indicates that communication has been lost with a remote device such as
a remote keypad.
(This fault will normally occur if the remote keypad is disconnected while
the D3 control board is powered up. Only connect and disconnect a
SPI
remote keypad when the control power is off.)
Communication
Verify that the remote keypad cable has not been damaged and that its
Fault
connectors are firmly seated at both the keypad and the D3 Control
board.
Route keypad cables away from high power and/or high noise areas to
reduce possible electrical noise pickup.
Indicates that the starter has lost serial communications. Fault occurs
when the starter has not received a valid serial communications within
Modbus Timeout
the Communication Timeout parameter (FUN 12, P59) defined time.
Fault
Examine remote system for cause of communication loss.
Typically occurs when attempting to run a version of control software that
is incompatible with the D3 control board hardware being used. Verify
that the software is a correct version for the D3 control board being used.
CPU Error – SW
Consult factory for more details.
fault
Fault can also occur if the D3 control has detected an internal software
problem. Consult McQuayService.
The non-volatile user parameter values have been found to be corrupted.
CPU Error –
Typically occurs when the D3 control is re-flashed with new software.
Parameter
EEPROM
If fault persists after performing a Factory Parameter reset, consult
Checksum Fault
McQuay Service.
The D3 control has detected an internal CPU problem. Consult McQuay
CPU Error
Service.
CPU Error – SW The D3 control has detected an internal software problem. Consult
Watchdog Fault McQuay Service.
The D3 control has detected an internal CPU problem. Consult McQuay
CPU Error
Service.
CPU Error –
Program EPROM The non-volatile program memory has been corrupted.
Checksum Fault
Detailed Description of Fault / Possible Solutions
OM Centrif Micro ΙΙ-5