Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
APPENDIX B – STARTUP, STATUS, AND FAULT MESSAGES
OMM-0128_0A
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
85
of
144
GF-206-K
Ph.: 800-526-0288
07/17/2017
TABLE B-2: Fault Messages
FAULT MESSAGE
FAULT DESCRIPTION
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.