Camus Hydronics DFH/W500 Installation, Operation And Service Manual page 60

SYMPTOM
• Manual Reset Safety High Limit
• Alert: 63, 67, 79, 137, 276-281,
Manual Reset High
• ILK OFF
Limit Trips (if
equipped)
• Outlet temperature has exceeded
• Alert: 124
Delta-T Limit
Tripped
• Stack temperature has exceeded
• Alert: 125
• Outlet temperature has exceeded
Temperature
Overshoot
• Alert: 63, 67, 79, 137, 276-281,
• LCI OFF
• Inlet sensor, Alert: 91
• Outlet sensor, Alert: 92
Sensor Not
• DHW sensor, Alert: 93
Connected
• Flue sensor, Alert: 95
• Outdoor sensor, Alert: 96
• Fan refuses to rotate
Fan Not Turning
• Alert 122, 123, 128, 129, 130, 131,
132
• Air Switch error
• Alert: 67, 137, 303-310
Air Proving Switch • ILK OFF
• IAS OFF
• LCI error
• Alert: 63, 137, 276-281
Blocked Flue
• LCI OFF
Switch
55
FAILURE MODE
tripped, outlet temperature in
o
excess of 210 F
303-309
o
40 F over inlet temperature
the limit temperature.
limit temperature.
303-309
• Verify that the capillary tube is broken. If this is the case,
replace Manual Reset High Limit
• Verify that the system is full of water and that all air has
been properly purged from the system.
• Verify that the boiler is piped properly.
• Verify that 120 VAC is being supplied to the boiler pump on
a call for heat. If voltage cannot be detected check wiring.
• Verify that the pump is circulating when 120 VAC is
supplied. If so, pump impeller may be stuck. Use a flat
head screwdriver on face of pump to turn impeller
manually.
• If 120 VAC is present during a call for heat, but the pump
still does not circulate, replace pump.
Verify that the system is full of water and that all air has been
properly purged from the system.
• Verify that the boiler is piped properly.
• Verify that 120VAC is being supplied to the boiler pump on
a call for heat. If voltage cannot be detected check wiring.
• Verify that the pump is circulating when 120VAC is
detected. If not, pump impeller may be stuck. Use a flat
head screwdriver on face of pump to turn impeller manually
• If 120VAC is present during a call for heat, but the pump still
does not circulate, replace the pump.
• Purge all air from the piping
• Verify boiler water pressure exceeds 30 PSI
• The stack temperature has exceeded the maximum
temperature allowed.
o
• PVC: 149 F
o
• CPVC: 194 F
• AL29-4C, Stainless Steel: 250
• Measure the resistance of the flue sensor at room
temperature, it should be approximately 10kΩ.
• Verify that the system is full of water and that all air has
been properly purged from the system
• Verify that the boiler is piped properly.
• Verify that adequate power is supplied to pump on a call for
heat. If voltage cannot be detected check wiring
• Verify pump is circulating when power is supplied. If so,
pump impeller may be stuck.
• If power is present during a call for heat, but the pump still
does not circulate, replace the pump.
• Replace the DynaFlame Controller, if necessary.
• Verify sensors are connected
• Verify wiring.
• Measure resistance of sensors, 10kΩ sensors.
• Replace sensor if necessary
• Check fan power wires
• Fan signal wires are interchanged
• Minimum fan speed must be greater than 1600 RPM
• Air Switch wire(s) is/are loose
• Air Switch is set too tight, reduce sensitivity by turning
screw ¼ turn counter-clockwise.
• Blocked Flue Switch wire(s) is/are loose
• Blocked Flue Switch is set too tight, reduce sensitivity by
turning screw ¼ turn clockwise.
ANALYSIS
o
F