McQuay RVSS14 Installation, Operation And Maintenance Manual page 46

Fault
Description
Code
Analog Input
F71
Level Fault Trip.
SPI
F81 Communication
Fault
Modbus
F82
Timeout Fault
CPU Error –
F94
SW fault
CPU Error –
F95
Parameter
EEPROM
Checksum Fault
46
Detailed Description of Fault / Possible Solutions
Based on the Analog Input parameter settings, the analog input level has either
exceeded or dropped below the Analog Input Trip Level setting (I/O 08,
longer than the Analog Input Trip Delay time (I/O 09, P47).
Measure value of analog input to verify correct reading.
Verify settings of all Analog Input parameters (I/O 07-11,
Verify correct positioning of input jumper JP3 (Voltage or Current) on the D3 control
card.
Verify correct grounding of analog input connection to prevent noise or ground loops
from affecting input.
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 remote keypad when the
control power is off.)
Verify that the remote keypad cable has not been damaged and that its connectors are
firmly seated at both the keypad and the D3 Control board.
Verify that the display interface board (when present) is firmly attached to D3 control
card.
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 the Communication Timeout
parameter (FUN 12, P59) defined time.
Verify communication parameter settings (FUN 10-12, P59-P61).
Check wiring between the remote network and the D3 control card.
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. Consult factory for more
details.
Fault can also occur if the D3 control has detected an internal software problem.
Consult factory.
The non-volatile user parameter values have been found to be corrupted. Typically
occurs when the D3 control is re-flashed with new software.
Perform a Factory Parameter reset and then properly set all user parameters before
resuming normal operation.
P46
) for
P45
-49).
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