Benchmark 5000-6000 Operation & Maintenance Manual
APPENDIX B
– STARTUP, STATUS, AND DISPLAY MESSAGES
OMM-0118_B
•
GF-203
•
5/9/2019
Technical Support
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TABLE B-2: Fault Messages
Fault Message
Fault Description
LOW WATER
LEVEL
The Low Water Cutoff board is indicating low water level.
NETWORK COMM
FAULT
The RS-485 network information is not present or is corrupted.
O
2
% OUT OF RANGE
The
O
2
% has gone below 3% or above 8%.
OUTDOOR TEMP
SENSOR FAULT
The temperature measured by the Outdoor Air Sensor is out of
range.
OUTLET TEMP
SENSOR FAULT
The temperature measured by the Outlet Sensor is out of range:
•
OUTLET TEMPERATURE display = SHt Indicates sensor
is shorted
•
OUTLET TEMPERATURE display = Opn indicates sensor
is open-circuited
PRG SWTCH CLOSED
DURING IGNITION
The Purge Position Limit switch on the Air/Fuel Valve closed
during ignition.
PRG SWTCH OPEN
DURING PURGE
The Purge Position Limit switch on the Air/Fuel Valve opened
during purge.
REMOTE SETPT
SIGNAL FAULT
The Remote Setpoint signal is not present or is out of range.
RESIDUAL
FLAME
The Flame signal was seen for more than 60 seconds during
standby.
SSOV
SWITCH OPEN
The SSOV switch opened during standby.
SSOV FAULT
DURING PURGE
The SSOV switch opened dug purge.
SSOV FAULT
DURING IGN
The SSOV switch closed or failed to open during ignition.
SSOV FAULT
DURING RUN
The SSOV switch closed for more than 15 seconds during run.
SSOV RELAY
FAILURE
A failure has been detected in one of the relays that control the
SSOV.
STEPPER MOTOR
FAILURE
The Stepper Motor failed to move the Air/Fuel Valve to the desired
position.
