Pentair ThermalFlo - Manual (Page 34)

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ThermalFlo Installation and User’s Guide
Remote, Pool or Spa light ON.
Water Pressure light ON.
Thermostat light OFF.
EO1 Error
Unit will not run.
Remote, Pool or Spa light ON.
Water Pressure light ON.
Thermostat light ON.
Unit is cycling on & off.
Remote, Pool or Spa light ON.
Water Pressure light ON.
Thermostat light ON.
Fan is not turning.
Unit will not start.
All control lights ON.
Fan is turning, no cool air
discharging out the top of heater.
Unit is not heating.
Spa will not heat to maximum
temperature of 104° F.
Thermostat is turned all the way up.
OR
Spa is heating very slowly.
Pool is heating very slowly.
Pool is not getting up to temperature.
Low or restricted water flow through heater. Dirty
or worn filters or clogged lint traps. Clogged
filter pump impeller. Improper plumbing valve
settings. Suction leak allowing air into the water
flow. Low water flow when switched to spa mode.
Unit is plumbed backwards. Heat exchanger
clogged with debris. Internal bypass valve
damaged or clogged with debris. Refrigerant
system malfunction.
Low or restricted water flow through heater. Dirty
or worn filters or clogged lint traps. Clogged
filter pump impeller. Improper plumbing valve
settings. Suction leak allowing air into the water
flow. Low water flow when switched to spa mode.
Unit is plumbed backwards. Heat exchanger
clogged with debris. Internal bypass valve
damaged or clogged with debris. Fan cycling.
Low water flow through heater. Dirty or worn
filters or clogged lint traps. Clogged filter pump
impeller. Improper plumbing valve settings.
Compressor has not started yet. Low water flow
through heater. Dirty or worn filters or clogged
lint traps. Clogged filter pump impeller. Improper
plumbing valve settings.
Low or restricted water flow through heater.
Dirty or worn filters or clogged lint traps. Clogged
filter pump impeller. Improper plumbing valve
settings. Suction leak allowing air into the water
flow. Low water flow when switched to spa mode
or the control is not in spa mode. Unit is plumbed
backwards. Heat exchanger clogged with debris.
Internal bypass valve damaged or clogged with
debris. Your spa thermometer is not reading the
correct temperature. Air blower is running.
Venturi air inlets are open. It is very cold outside.
Spa pump is not running.
Low or restricted water flow through heater.
Dirty or worn filters or clogged lint traps. Clogged
filter pump impeller. Improper plumbing valve
settings. Suction leak allowing air into the water
flow. It is cold outside. Pool pump timer is not set
for a long enough running period. Pool is not
covered. High wind speed over pool. Shaded
pool area.
Clean entire filtering system and or replace filter
element. Inspect & clean pump impeller. Adjust all
plumbing valves. Repair suction air leaks, grease
pump lid o-ring. Replace filter. Wrong filter pump pipe
size. Automatic pool vacuum causing restriction.
Recharge refrigerant if required.
Call your dealer for advise. Call the factory for advise.
Clean entire filtering system and or replace filter
element. Inspect & clean pump impeller. Adjust all
plumbing valves. Repair suction air leaks, grease
pump lid o-ring. Replace filter. Wrong filter pump pipe
size. Automatic pool vacuum causing restriction.
Call your dealer for advise. Call the factory for advise.
Clean entire filtering system and or replace filter
element. Inspect & clean pump impeller. Adjust
plumbing valves. Adjust water pressure switch.
Call the factory for advice.
Wait for the 5 minute compressor time delay. Clean
entire filtering system and or replace filter element.
Inspect & clean pump impeller. Adjust plumbing valves.
Call factory or dealer.
Clean entire filtering system and or replace filter
element. Inspect & clean pump impeller. Adjust all
plumbing valves. Repair suction air leaks, grease
pump lid o-ring. Shut off air blower and or Venturi
inlets that allow air turbulence in the spa. Use a cover
while heating the spa. Outside air temp. too cold. Set
spa pump timer for longer time. Call your dealer for
advice. Call the factory for advice.
Clean entire filtering system and or replace filter
element. Inspect & clean pump impeller. Adjust all
plumbing valves. Repair suction air leaks, grease
pump lid o-ring. Use a pool cover. Place a wind break
around pool. Set pool pump timer longer. Call your
dealer for advice. Call the factory for advice.
Problem Possible Cause Corrective Action