Weil-McLain SlimFit Manual page 107

SlimFit
™
commercial condensing gas
Troubleshooting
Figure 103 Troubleshooting suggestions for SlimFit boilers
Sola Fault Displays, Diagnostics and Suggested Corrective Actions
Display Condition
Nothing shown on Control is not
display screen and receiving 24V power
blower running at
full speed
Nothing is shown Control is not
in display screen receiving 120V power
and no other boiler
components are
operating
Nothing is shown Occurs when power
on display screen, is lost from the Sola
but boiler is module to the display.
operating
Boiler Icon not Occurs when the
shown on display communication is lost
from the Sola to the
display.
Boiler Icon Black Occurs when the
on display communication is lost
from the Sola to the
display.
Outlet T-Rise Limit Occurs when supply
water temperature in
heat exchanger rises
faster than 2ºF per
second.
Delta-T inlet/outlet Boiler Out temperature
limit has exceeded the
Boiler In temperature
by more than 58ºF
Part number 550-100-116/0713
-
fired water boiler
(continued)
(continued)
Diagnostics
Check wiring for short circuit or incorrect
wiring.
Check 2-amp low voltage fuse on
transformer shown on page 100.
Check transformer connection per
wiring diagram. Check for 24V output of
transformer.
Check service switch and/or circuit
breaker to boiler turned is on.
Is there 120 Volts at the service switch?
Is the SlimFit ON/OFF POWER SWITCH
located on top of the boiler turned on?
Check for 120 volts at the line voltage
terminal block located inside the control
pod.
Check for loose connections and proper
pin alignment/engagement in the main
harness and the back of the display
circuit board.
Cycle power off and on using boiler
power switch and check for operation.
Display has been disconnected from Sola
Control
Check for loose connections and proper
pin alignment/engagement in the main
harness and the back of the display
circuit board.
Display has been disconnected from Sola
Control
Check for loose connections and proper
pin alignment/engagement in the main
harness and the back of the display
circuit board.
Automatically resets after 5 minute delay
or using manual reset on display.
Automatically resets after 15 second
delay or using manual reset on display.
After 20 automatic resets occur in the
same heat demand the boiler will need a
manual reset.
— Boiler Manual
Corrective actions
• Correct wiring per wiring diagram including connection of
transformer.
• Replace fuse with proper part found in replacement part section
of this manual. If fuse blows again recheck wiring per diagram.
• Replace transformer if it is is receiving 120Vac, but not output-
ting 24VAC.
• Turn on service switch to power boiler.
• Troubleshoot and correct the power supply to the service
switch.
• Turn the SlimFit power switch on top of the boiler to ON.
• Correct wiring inside the control pod using the wiring diagram
in this manual.
• Check for continuity on the wire harness from the display to the
SlimFit. See repair parts section for proper replacement part.
• Replace with new display module. See repair parts section for
proper replacement part.
• Reconnect and perform synchronization process
• Check for continuity on the wire harness from the display to the
SlimFit. See repair parts section for proper replacement part.
• Reconnect and perform synchronization process
• Check for continuity on the wire harness from the display to the
SlimFit. See repair parts section for proper replacement part.
• Verify water piping is installed correctly using primary/secondary
connection to the boiler loop. Verify that piping methods and
sizes comply with the instructions in this manual.
• Verify proper pump sizing for boiler size and system require-
ments.
• Verify boiler pump is energized
• See message displayed Inlet sensor fault or outlet sensor fault
and follow procedure for loose connections.
• Verify water piping is installed correctly using primary/secondary
connection to the boiler loop. Verify that piping methods and
sizes comply with the instructions in this manual.
• Verify proper pump sizing for boiler size and system require-
ments.
• Verify boiler pump is energized
• See message displayed Inlet sensor fault or outlet sensor fault
and follow procedure for loose connections.
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