Lochinvar Power-fin 502 Service Manual page 41

3
Troubleshooting
Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Operator Interface
F F A A U U L L T T
The temperature rise across the heat
exchanger has exceeded the set parameters
for the appliance.
Temp O/Shoot
(continued)
(Lockout will reset
automatically after
5 minutes or may be reset
immediately once
condition has been
Outlet water temperature has exceeded the
corrected. Press the
maximum outlet water temperature.
RESET button on the
SMART SYSTEM display
to reset.)
External control is cycling too often.
Rem Ctrl Flt
After downloading parameters from a laptop
Parameters
or a pocket pc, the main control board must
Progr
be reset.
(Will require a manual
reset once the condition
has been corrected. Press
the RESET button on the
SMART SYSTEM display
to reset.)
(continued)
D D E E S S C C R R I I P P T T I I O O N N C C O O R R R R E E C C T T I I V V E E A A C C T T I I O O N N
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the appliance is piped properly into the
heating system. Refer to Section 4 - Water
Connections of the Power-fin Installation and
Operation Manual for the proper piping methods.
• Check for 120 VAC to the pump motor on a call
for heat. If voltage is not present, check the wiring
leading to the main control board. Replace the main
control board if necessary.
• If 120 VAC is present on a call for heat and the
pump is not operating, replace the pump.
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the appliance is piped properly into the
system. Refer to Section 4 - Water Connections of
the Power-fin Installation and Operation Manual for
the proper piping methods.
• Check 120 VAC to the pump motor on a call for heat.
If voltage is not present, check wiring leading to the
main control board. Replace the main control board
if necessary.
• If 120 VAC is present on a call for heat and the pump
is not operating, replace pump.
• Replace the main control board.
• Check set point of the external control.
• Check the wiring between the external control and
the unit.
• Replace the control.
• Press the ENTER/RESET button on the Smart
System display panel.
Service Manual
41