Lochinvar EnergyRite ER152 - Manual (Page 26)

3
Troubleshooting
26
Service Manual
Table 3D (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Pool Heater
Interface
FAULT DESCRIPTION CORRECTIVE ACTION
High Limit Open
The outlet water temperature has
exceeded the fixed setting of the
automatic 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 pool heater is piped properly into the
heating system. Refer to Section 7 - Water
Connections of the EnergyRite Installation and
Operation Manual for the proper piping methods for
the pool heater.
• Replace the main control board if necessary.
• Check resistance of water sensors and compare to
Table 3B on page 23 of this manual. Replace sensor
if necessary.
• Replace high limit.
Sensor Shorted
Either the inlet water or outlet water
temperature sensor has been shorted. • Check the sensors and their associated wiring.
Repair or replace the sensor or wiring if damaged.
• Measure the resistance of the sensors and compare
the resistance to Table 3B on page 23 of this
manual.
• Replace the sensor if necessary.
AUX Device 2
Open
Models 152 - 202: The field supplied
safety wired into AUX Device 2 has
opened.
Models 252 - 402: The low gas pressure
switch has not closed.
• Models 152 - 202: Ensure other safety devices are
working properly and conditions are correct.
• Models 252 - 402: Ensure there is proper gas
supply pressure to the pool heater.
Proving Switch External proving switch has not closed.
• Ensure the external proving switch is connected and
operating properly.
Air Switch Open
The combustion air chamber is not
reaching the proper pressure.
• Ensure there is no blockage of the flue or air inlet.
• Ensure the front combustion air chamber is sealed
properly.
• Ensure proper voltage is being delivered to the pool
heater.
• Ensure the pressure switch wiring and hoses are all
in good condition and sealed properly.
Air Switch Short
The control sensed an air pressure switch
closure prior to powering the blower. • Ensure the switch is wired properly.
• Replace the switch.