Lochinvar EnergyRite ER252 Service Manual page 27

3
Troubleshooting
Table 3D (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Pool Heater
Interface
FAULT
Pool Standby /
Low Water Flow
Outlet Sensor
Open
Inlet Sensor Open
Outlet Temp
Exceeded
Lockout / Low
Water Flow
Button
One of the buttons has malfunctioned.
Malfunction
(continued)
DESCRIPTION
The pool heater has a call for heat, but
there is insufficient water flow.
The control does not sense the presence
of an outlet sensor.
The control does not sense the presence
of an inlet sensor.
The outlet temperature has exceeded the
maximum allowable outlet temperature.
The pool heater sensed low water pressure
while the pool heater was running.
CORRECTIVE ACTION
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the pool heater is piped properly into the
heating system. Reference Section 7 - Water
Connections in the EnergyRite Installation and
Operation Manual for the proper piping methods for
the pool heater.
• Replace the switch.
• Ensure proper wiring of the outlet sensor.
• Replace the sensor.
• Replace the main control board.
• Ensure proper wiring of the inlet sensor.
• Replace the sensor.
• Replace the main control board.
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the pool heater is piped properly into
the heating system. Reference Section 7 - Water
Connections in the EnergyRite Installation and
Operation Manual for the proper piping methods
for the pool heater.
• Measure the resistance of the sensors and
compare the resistance to Table 3B on page 23 of
this manual.
• Replace the sensor if necessary.
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the pool heater is piped properly into
the heating system. Reference Section 7 - Water
Connections in the EnergyRite Installation and
Operation Manual for the proper piping methods
for the pool heater.
• Replace the board.
Service Manual
27