Benchmark Platinum-Edge: Operation-Service Manual
SECTION 6 – TROUBLESHOOTING
OMM-0137_D • GF-211
•
7/16/2019
Technical Support
•
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TABLE 10-1: Boiler Troubleshooting Procedures
Fault
Probable Causes
Corrective Action
INTERLOCK
OPEN
1.
Interlock jumper not installed or removed.
1.
Check for a jumper properly installed across the interlock terminals
in the I/O box.
2.
Energy Management System does not have unit
enabled.
2.
If there are two external wires on these terminals check any Energy
Management system to see if they have the units disabled (a jumper
may be temporarily installed to see if the interlock circuit is
functioning).
3.
Device proving switch hooked to interlocks is
not closed.
3.
Check that proving switch for any device hooked to the interlock
circuit is closing and that the device is operational.
LINE VOLTAGE
OUT OF
PHASE
1.
Line and Neutral switched in AC Power Box.
1.
Check hot and neutral in AC Power Box to ensure they are not
reversed.
2.
Incorrect power supply transformer wiring.
2.
Check transformer wiring, in AC Power Box, against the power box
transformer wiring diagram to ensure it is wired correctly.
LOW GAS
PRESSURE
1.
Incorrect supply gas pressure.
1.
Measure gas pressure upstream of the SSOV Actuator(s) with the
unit firing. Ensure it is above the value in Table 4-2 (Natural Gas) or
Table 4-5 (Propane).
2.
Defective Low Gas Pressure switch.
2.
Measure gas pressure at the Low Gas Pressure switch. If it is
greater than
1 inch above
the Low Gas Pressure switch setting
in Table 4-2 (Natural Gas) or Table 4-5 (Propane), measure
continuity across the switch and replace if necessary.
LOW WATER
LEVEL
1.
Insufficient water level in system.
1.
Check system for sufficient water level.
2.
Defective water level circuitry.
2.
Test water level circuitry using the Low Water
TEST
and
RESET
buttons on the Controller’s front panel. Replace water level circuitry
if it does not respond.
3.
Defective water level probe.
3.
Check continuity of probe end to the shell, change probe if there is
no continuity.
MODBUS
COMMFAULT
Unit not seeing information from Modbus network.
Check network connections. If fault persists, contact qualified
Service Personnel.
