10
ENVISION POOL HEATER INSTALLATION MANUAL
Preventive Maintenance
WARNING: Disconnect electrical power to unit before
starting any maintenance to prevent serious injury from
shock.
Protecting the Heater
Keep the pool filter system clean and free of restrictions
•
to ensure proper water flow.
Check water chemistry regularly. Misuse of chemicals
•
will cause permanent damage to the heater and other
pool equipment. Manufacturers can void warranties for
damage as a result of poor water quality.
Free airflow is essential. Keep the evaporator coil clean
•
and free of weeds, leaves, grass clippings, dirt, and other
debris that will decrease the airflow. Keep fences and
shrubs away from air inlets (sides and back of heater).
Frequent rinsing of the evaporator with fresh water will
•
remove buildup from its surface. Always spray the coil
gently with a regular garden hose being careful no to
bend aluminum fins.
Regular cleaning of the cabinet will improve its
•
appearance and extend the life of the finish.
Winterizing
When the heater is exposed to freezing temperatures, it is
essential that all water within the unit be properly drained.
When water freezes, it expands, damaging piping.
Turn thermostat settings to OFF. Turn filter pump to OFF.
•
Turn power to unit OFF (i.e. pull disconnect or turn circuit
•
breaker OFF).
Disconnect water inlet and outlet unions at the back of
•
the unit, be careful no to lose rubber o-rings.
Flush the heater piping out with fresh water to remove
•
any residual chemicals.
Use low-pressure air or vacuum to remove water that has
•
accumulated inside the piping of the heater.
Troubleshooting
Check to be sure that the electrical power is ON. Reset
1.
the breakers or replace fuses if necessary.
Check to be sure the electronic control panel is set
2.
properly. The unit must be in either the POOL or SPA
mode and the desired temperature must be set above
the actual pool or spa temperature for the heater to
run. If an error code is displayed, reference the table
below to determine the cause.
Check to make sure the evaporator coil has enough
3.
clearance and that there are no restrictions to its
airflow.
Certain ambient air conditions may cause the heater
4.
to go into defrost mode. The defrost mode will be
indicated by the Defrost LED.
NOTE:
It is normal for water to drip from the drain holes at
the base of the heater. The unit produces condensate when
it operates.
The following table lists error codes as the would appear
on the electronic control display. In the event that an
error does occur, check the possible causes list for the
corresponding error to correct the problem.
Error Code
Description
Possible Causes
F1
Internal Flow
Switch Open
Little or no water flow
The pump is not running
The filter is dirty or clogged
Shortage of water to pump, air leak
Undersized pump
Valves not in correct position
Filter in backwash mode
Water pressure switch needs
adjustment or its defective
FS
Internal Flow
Switch Open
Remote Mode
Same as above
HP
High Pressure
Switch Open
Low water flow to heater
Defective high pressure switch
LP
Low Pressure
Switch Open
Evaporator coil is dirty
Fan motor is not running
Low refrigerant pressure
Defective low pressure switch
PO
Water Thermistor
Open
Loose sensor wire
Defective water thermistor
HC
Water Thermistor
Closed
Wire terminals touching
Defective water thermistor
dO
Defrost Sensor
Open
Loose sensor wire
Defective defrost sensor
Dc
Defrost Sensor
Closed
Wire terminals touching
Defective defrost sensor
bO
Control Voltage
Below 18VAC
Low supply voltage to the unit
