Hayward HeatPro User manual

OWNER’S MANUAL
Installation
,
O
p
eration and Service
Jan. 2004
TA2267
HEAT PUMP STYLE
POOL / SPA
HEATERS

Owner’s
Manual
I. Operating Principles
•How a heat pump works…………...………………………………………………….2
•Get familiar with your heat pump ………………………………………………...….3
•Temperature control systems for each model……………………….………...……4-9
II. Installation Specifications and Procedures
•Receipt inspection of unit……………………………………………………...……10
•Determining optimum location…………………………………………………..….10
o
Clearance…………………………………………………………….………….11
o
Placement………………………………………………………………………..11
o
Drainage…………………………………………………………………………11
o
Other Precautions………………………………………………………………..12
III. Application Guidelines and Maintenance
•Climate Conditions……………………………………………………...……….…..12
•Pool Cleaning Systems………………………………………………………………12
•Efficient Practices
o
Using a pool cover…………………………………………..…………………..13
o
Water flow………………………………………………………………………13
o
Chlorine content…………………………………………………………………13
•Cleaning Procedures………………………………………………………..………..14
•At the beginning of each season………………………………………….………….14
•Occasional / Weekend Use…………………………………………….…………….15
•Summertime Shutdown…………………………………………….………………..15
•At the end of each season………………………………………...………………….15
IV. Service Procedures
•Before you call for service……………………………………………..………..16, 38
•Troubleshooting guide…………………………………………………………...16-18
V. Warranty……….……………………..……………………………….………...19
VI. Installation Guide……………………………………………………...…20-40

2
How a Heat Pump Works
Hayward Heat Pumps take heat from the environment and use it to heat your pool
water. During heat pump operation, liquid freon from inside the unit is pumped
through the system (A) and is turned into a heated gas. This happens when heat is
taken from the surrounding air (B) as it is drawn through the evaporator by the fan.
The compressor (C) receives this warmer gas and compresses it to a higher
pressure, resulting in the freon reaching even higher temperatures. As the unit
sends the heated gas through the heat exchanger, the gas gives up its heat to the
surrounding water (D). The freon reverts to a liquid state as it gives up the heat to
the pool water, which completes the cycle (A). The water (F), which is being
forced through the heat exchanger (D) by your pool pump, is heated by three to
five degrees as it passes through and returned to your pool as heated water. (G)
This process can also be reversed to remove heat from pool water.
A heat pump can transform 4 to 6 units of heat energy (BTU’s) for every 1
equivalent unit of electrical energy it consumes. This results in a coefficient of
performance between 4 and 6. The specific performance coefficient depends on
your heater model, ambient air temperature and climatic conditions, as well as
incoming pool water temperatures.

Heat Pump Pool / Spa Heater Owner’s Manual
3
Get Familiar with Your Heat Pump
Safety Features
Hayward heat pumps are equipped with safeguards that will stop operation to protect your unit in case
of the following events:
•Excessively high refrigerant pressure
•Excessively high water temperature
•Loss of refrigerant
•Fan Motor Failure
•Evaporator Freeze-up
•Low Ambient Temperature
•Refrigerant line blockage or overcharging
High / Low Refrigerant Pressure Switches
•The high-pressure switch senses the refrigerant pressure in the sealed refrigeration system
and shuts the heater down in the event unsafe operating pressures are reached. The heat pump
will automatically reset after the system pressure drops back to normal operating pressures. When
this switch is tripped, digital displays will read “HP”
•The low-pressure switch senses the refrigerant pressure in the sealed refrigeration system to
protect against certain conditions that could be detrimental to compressor life. The switch shuts
the unit down in the event of loss of refrigerant, fan motor failure, evaporator freeze-up and
airflow blockage. The switch automatically resets when the pressure rises to normal operating
pressures. The display will show “LP” if this switch is tripped.
Evaporator Freezing
The low-pressure switch will shut the heat pump down when the evaporator starts to freeze.
When the unit starts to freeze the low-pressure switch will be tripped, causing the display to read
“LP” This will prevent the evaporator from becoming damaged or deformed.
Water Pressure Switch
The water pressure switch contacts close when pressure is applied as pool water flows through
the heat exchanger. Low flow rates as well as no flow will let these contacts open and this will
cause the unit to shut down. The display will read “PS” if the water pressure is not sufficient.
Time Delay
All models use a 5-minute time delay to prevent repeated tripping of the compressor thermal
overload, which is caused by attempting startup before system pressures are equalized. Any
interruptions, outside of power loss, will result in a 5-minute time delay.
Low Ambient Temperature
If the air outside the heat pump is not warm enough to produce heat, the system will shut down.
The actual point at which your unit will shut down due to low temperature varies depending on
which model you purchased, current weather conditions, and the amount of sunlight reaching the
heat pump. The shutdown can occur anywhere within a wide range of temperatures, usually
45≡F-55≡F. This is not a “fixed” range. We stress that climate conditions, sunlight, and various
models respond quite differently to low ambient temperature. A shutdown occurs because low
temperatures will activate the systems low-pressure safeguard switch (digital thermostats will
display a code “LP”.) The unit will start up again when the temperature has raised enough to reset
this switch. Note: Low ambient temperature does not necessarily affect the Chiller models
or the cooling cycle of the heat/cool units.

4
Analog Thermostat
Single Mechanical Thermostat
Power Indicator Light: Shows that power is supplied.
Heat Indicator Light: Shows the unit is operating normally and the thermostat is making a demand for heat.
Temperature Control Knob: Adjust knob to desired range, using the diagram above as a guide. The
thermostat has a temperature range from 60°F – 105°F. Once the dial is set to a preferred temperature, the
unit will achieve and maintain this temperature.
** The Single Mechanical Thermostat models do not turn off under 60 degrees F. This model was designed
to come on automatically if your water temperature is below 60 degrees to prevent the pool from becoming
excessively cool and creating long recovery times. If your application dictates the need to turn the heater off
for extended periods of time, use the circuit breaker.
For help with this type of control, refer to Troubleshooting Guide for MECHANICAL Thermostat
Control in the back of the owner’s manual.
105°F
60°F
60°F
105°F
Approx. 83°F
Approx.
83°F
Power Indicator Light: Shows that proper power is
supplied.
Heater Indicator Light: Shows the unit is operating
normally and the thermostat is making a demand for
heat.
Temperature Control Knob: Adjust knob to desired
range, using the diagram on the left as a guide. The
thermostat has a temperature range from 60°F –
105°F(approx. ±5°at the mid point.) Once you have
the dial is set to the preferred temperature, the unit
will achieve and maintain this temperature.
For help with this type of control, refer to the
troubleshooting guide.

Heat Pump Pool / Spa Heater Owner’s Manual
5
Dual Mechanical Thermostat
Power Indicator Light: Shows that power is supplied.
Heat Indicator Light: Shows that the unit is operating normally and the thermostat is making a
demand for heat.
Temperature Control: Adjust knob pool or spa to desired range, using the diagram
above as a guide. The thermostat has a temperature range
from 60°F – 105°F. Once the dial is set to a preferred
temperature, the unit will achieve and maintain this
temperature.
Mode Toggle Switch:Off: Middle position, sets the unit to a “no-heating” mode.
Pool: Flip the switch toward the pool control knob (left). This sets the
unit into pool mode. The unit will maintain the preferred
temperature set point for your pool.
Spa: Flip the toggle switch toward the spa control knob (right). The unit
will maintain the preferred temperature set point for your spa.
For help with this type of control, refer to Troubleshooting Guide for MECHANICAL
Thermostat Control in the back of the owner’s manual.
105°F
60°F
Approx. 83°F

6
PST-1
Power Indicator Light: Indicates that power is
supplied to the heat pump
but does not indicate that
the unit is in operation.
Heating Indicator Light: Shows the unit is operating
normally and the thermostat
is making a demand for
heat.
Display: When power is supplied to
the unit, the display will
either show temperature,
diagnostic code (such as “PS”), or rolling dots.
On/Off: This control does not have a true on/off feature. The unit uses standby mode
instead. Rolling dots in the display indicate standby. Standby mode serves two
functions. (1) It serves as an “off” mode, which keeps the heat pump from
transferring heat into your pool water. (2) Standby allows a pool owner with
remote controlling systems, such as Jandy or ComPool, to maintain pool and
spa temperatures via their remote.
To enter standby mode: If pool mode is active (indicated by the green led over the pool button), press
the pool button once. Rolling dots should appear on the display.
If spa mode is active (indicated by the green led over the spa button), press the
spa button once. Rolling dots should appear on the display.
To exit standby mode: Press either the pool or spa mode button.
Mode Selection: Selecting the desired mode of operation (spa or pool) is accomplished using the
POOL / SPA buttons. A green LED above buttons designates the active mode.
When the pool mode is active, any displays or adjustments apply only to the
pool mode. Adjustments for spa mode must be made while the spa button is
activated. A user can switch between modes without turning the control to
standby first.
Temperature
Setpoint: Pool mode range is 70-98°F (21-37°C).
Spa mode range is 70-105°F (21- 41°C).
Adjust the setpoint:Continuing to hold the up or down button will scroll the setpoint value until
the desired setpoint is reached. When the desired value has been reached, release the button. The
new setpoint will flash to indicate a new value has been recognized and the display will revert
back to water temperature as indicated by a steady display.
Note:The temperature reading displayed when the unit is in operation (heating indicator light is present)
displays the current water temperature.
To display the setpoint:Press and release the Temperature Set up or down button once will display the current
setpoint for 3 seconds.
For help troubleshooting this type of control, refer to the Troubleshooting
Guide for DIGITAL Thermostat Control in the back of this manual.

Heat Pump Pool / Spa Heater Owner’s Manual
7
PST-4
The PST-4 temperature control is similar to the PST-1
shown above, with two differences. (1) The PST-4 has
a Time Clock Override. (2) The PST-4 has no power
indicator light.
Please read the data for the PST-1 on the previous page before continuing. It will provide you with
descriptions of button functions and setpoint programming.
Time Clock Override: This feature must be connected by an electrician.TCO provides a method of
maintaining the pool temperature when a time clock has the pool filter pump
turned off. TCO function then controls the pool filter pump via the PST-4.
TCO will automatically turn the pool filter pump on after 2 hours of “off
time”. It will run the filter pump for 10 minutes while monitoring the water
temperature. If there is more than a 2-degree difference between the setpoint
and the actual pool temperature the heat pump will energize and continue to
run until the setpoint is satisfied.
A user may temporarily override the TCO. An example would be that you
want to use your pool between 9:00 and 10:00 pm. The control may be
programmed to energize the filter pump, which will engage the heat pump to
maintain the pool temperature. This is a temporary measure that can be
initiated in 30-minute increments, for a period up to 3 hours.
Programming for Temporary Pump Override:
1) Push and hold up and down buttons simultaneously – Display reads P0.0
2) Release buttons.
3) Push up button – display reads P0.5 (Each time the up Arrow engages, the
display will increase by .5 increments. Each .5 increment equals 30 minutes,
3 hours is the max.).
4) Push down button to decrease the temporary override time.
Example of typical TCO cycle: When the time clock turns off the filter pump, a “PS” will show on
the display. A timer starts inside the controller. After 2 hours, the heater will start the filter pump to
circulate water. “PS” is removed from the display and if a demand for more heat is made, the heater
goes back to normal operation. When the water is brought back to temperature, the TCO turns off the
filter pump and the heat pump will shut-down, displaying “PS”. The 2-hour timer is reset and the cycle
will begin anew.
For help troubleshooting this type of control, refer to the Troubleshooting Guide for DIGITAL
Thermostat Control in the back of this manual.
Notes:
1.An electrician must
wire the TCO
function to your pool
system before it will
work.
2.The 2-hour TCO
checking interval
cannot be adjusted.

8
PST-5
Heat/Cool
The PST-5 is an upgrade of the PST-4 with the addition of an AUTO function. This allows the heat pump to
heat or cool the water automatically to maintain the setpoint. The PST-5 also has an optional Time Clock
Override (TCO-This feature must be connected by an electrician to operate.)
Read the instructions for the PST-1 and PST-4 fully before continuing. . The PST-1 page will
provide you with descriptions of button functions and setpoint programming. If you have purchased
the TCO option, the PST-4 page will provide TCO functionality and programming procedures.
Run indicator light: Serves the same function as the “heating” indicator on the PST-1
and PST-4.
Setting the
AUTO function: 1. Disengage the AUTO mode (the AUTO mode indicator light
will be off.)
2. Program your desired temperature setpoint.
3. Press the AUTO button to activate the automatic heat / cool
function. (AUTO mode indicator will light.)
4. “AC5” should show on the display (set at the factory). “AC”
indicates that the cooling function is enabled and the
“5”means that when the water temperature is 5°F above the
setpoint, the unit will energize to cool your pool or spa.
By using the up and down keys, the AC5 can be changed to
values ranging from AC3 to AC9.
Setting unit to
cool only: Engage the AUTO mode and use the up button to scroll past “AC9”. You
will notice that after the display of “AC9” an “ACP” (AUTO Cool
Primary) will be displayed. When “ACP” is displayed, the unit will only
cool the pool and will not go into the heating mode, no matter how
cool the pool gets.
NOTE: The RUN light will flash during cooling cycles.
Time Clock Override: Refer to TCO information on the previous page. (PST-4)
If troubleshooting this controller, refer to the
Troubleshooting Guide for DIGITAL Thermostat Control.

Heat Pump Pool / Spa Heater Owner’s Manual
9
Installation Specifications
Receipt Inspection of Unit
Inspect the heat pump pool heater carton upon receipt for possible damage in shipment. Check
the “Tip-n-Tell” indicator attached to the outside of the box. A punctured or oil-soaked area of
the carton could indicate damage to the sealed refrigeration system. If damage has been
incurred or is suspected, bring it to the immediate attention of the delivering carrier. The carton
bears specific warnings stating “DO NOT DROP OR TAILGATE”,as well as arrows indicating
the correct vertical positioning. THE POOL HEATER MUST NOT BE TIPPED OR
TRANSPORTED ON ITS SIDE AS EVAPORATOR “OIL LOGGING” MAY OCCUR.
Upon arrival at the installation site, the unit should be carefully unpacked and again inspection
for any damage that may have occurred in transit. Minor indentations to the aluminum
evaporator fins will not affect performance of the unit.
THE MANUFACTURER CANNOT ACCEPT RESPONSIBILITY FOR
DAMAGE INCURRED OR REPAIRS NECESSITATED DUE TO IMPROPER
HANDLING OF OUR EQUIPMENT.
Determining Optimum Location
THE LOCATION OF THE HEAT PUMP POOL HEATER IS VERY IMPORTANT FOR
EFFICIENT OPERATION.
In order of importance, the installer must consider the following conditions:
o The heat pump will perform more efficiently when placed in direct sunlight.
o Ample air intake
o Avoidance of air recirculation
o Accessibility of service panels
o Means of draining condenser in freezing weather (such as union-style fittings)
o Means of draining condenser and rainwater. Insulation of long water lines (over 25 ft.) from
heater to pool.
The installation of the unit in a fully enclosed area (i.e. garage, shed, etc.) is not
recommended. Consult HAYWARD for indoor pool application analysis.

10
Clearance
A minimum of two feet of clearance from walls, shrubbery, equipment, etc. is required
around the entire pump circumference. This allows for ample air intake. No less than 6
feet clearance above the heat pump is required to prevent re-circulation of air. We
recommend not placing the unit underneath eaves, decks, or porches, as this causes
recirculation of discharged air.
RECIRCULATION OF DISCHARGED AIR BACK INTO THE PUMP WILL
GREATLY REDUCE ITS EFFICIENCY.
2 ft
2 ft
6 ft
Level Placement
The heater should be located on a solid, level surface. The pool heater is
exceptionally quite, but if further noise reduction is desired, the heat pump may be
placed on vibration absorbent pads, which are available from most air-
conditioning and refrigeration wholesalers.
Drainage
Condensation drain holes are provided in all base pans for adequate removal of
condensation and rainwater. Keep the drain holes unobstructed. Clean them
regularly (with your finger or a short stick) to remove any debris that may block
them.
HEAT PUMPS GENERATE WATER CONDENSATION DURING
NORMAL OPERATION. THIS SHOULD NOT BE MISTAKEN FOR A
LEAK IN THE UNIT.
The troubleshooting section provides recommendations should you suspect a leak.

Heat Pump Pool / Spa Heater Owner’s Manual
11
Other Precautions
The heat pump should not be placed near sprinkler systems, especially those
where fertilizer is added. This is very corrosive and, over time, will severely
damage the unit. If you live in an oceanfront area, the heat pump should be placed
out of direct spray of sand and salt. This will also clog, damage, and corrode the
unit. You may consider protecting your heat pump by planting shrubbery or a
privacy fence between the unit and the prevailing beachfront wind.
Application Guidelines and Maintenance
Climate
Weather conditions have a significant impact on pool heating. Local weather and
climate data are general conditions surrounding your pool. The microclimate
surrounding the pool must also be considered.
Lots of shade, low air temperature, relative humidity, and high wind velocity at the
pool surface negatively impact pool heating and will require an increased pool
heater output to maintain pool temperature.
Cleaning Systems
Some pools have cleaning systems attached to the filter pump intake (i.e. crawlers
and skimmers). These devices slow the flow of water entering the heat pump. As
low flow rates may damage the heat pump, built-in safeguards will automatically
shutdown the unit in instances of low water flow.
Dirty pool filters slow water flow and may cause a shutdown.
Familiarize yourself with the pool filter. Know how to check and clean or replace
it yourself. Do not completely trust a pool cleaning service to do this task for you.

12
Efficient Practices
Using A Pool Cover
POOL COVERS ARE STRONGLY RECOMMENDED.
A pool loses heat in several ways but testing shows that evaporative cooling (the cooling
effect created by water evaporating from the surface of the pool) accounts for
approximately 75% of a pool’s heat loss. However, if a pool is covered when it is not in
use, most evaporative cooling can be prevented. If the pool temperature is to be
maintained, the pool heating system must replace heat lost. Thus, the use of a pool cover
can offer dramatic savings in energy consumption. The cover’s approximate effect on
pool heat losses is illustrated in the table below:
SOURCE POOL UNCOVERED POOL COVERED
Of Heat Loss (USED 12 HRS/DAY)
Evaporative cooling 75% 30%
Convection loss to air 15% 10%
Ground loss (dry earth) (Negligible – less than 1%) (Negligible)
Re-radiation to environment 9% 9%
Make-up water 1% 1%
__________ ________________ ________________
Total 100% 50% of uncovered
pool losses
As the table shows, a pool cover that prevents evaporative cooling can reduce the
heat loss from a pool approximately 50% (which also cuts your power
consumption by 50%.)
Water Flow
To minimize heating times, make sure all water valves are open completely, that
the water level of the pool is at the correct height, and that any fountains or
waterfalls are disconnected or turned off. Maintain 30–75 gpm flow rate.
CHECK YOUR PUMP FILTER WEEKLY. REPLACE OR CLEAN AS
NECESSARY TO ENSURE PROPER FLOW RATES.
Chlorine Content
Chlorine is corrosive, along with other chemicals used in sanitizing pools.
Improperly maintained pH alkalinity levels are unhealthy for you and your pool
systems. Maintaining proper water pH levels will increase the life of all your pool
components, including your heat pump. Automatic chlorinators, if used, must be
installed downstream of the heat pump (in the return line to the pool) and a check valve
installed in a manner that will not allow the raw chlorine to drain back to the heat pump
when the water pump is off. Do not allow pool maintenance people to pour chemicals
in skimmer.

Heat Pump Pool / Spa Heater Owner’s Manual
13
Cleaning Procedures
•Disconnect power to the unit
(usually at the circuit breaker in
your house). Verify that power is
off by checking the display for
lights. If no lights are present,
proceed to the next step.
•Remove the fan guard by removing
(4) acorn nuts that retain the fan
guard. DO NOT REMOVE THE
NUTS THAT RETAIN THE FAN
MOTOR.
•Using a water hose and spray nozzle, direct water through the evaporator coil fins
to flush out debris. Spray from inside the unit to push debris out. Never spray
from the outside, as this will lodge debris in the evaporator coil fins. Keep nozzle
back 12-18 inches from the evaporator coil surface to prevent deforming the fin
surface. NOTE: Do not aim a water stream directly at the fan motor.
•Use a rag to remove build-up from the fan blades and the fan motor.
•If necessary, use a shop-vac to remove debris from the base pan and other areas of
the unit.
•Replace the fan guard and acorn nuts, securing them tightly.
•Use a rag and soapy water to clean the external plastic panels of the unit. DO
NOT wipe across the evaporator coil fins, as this will deform them and affect
operational efficiency. Instead use a very soft-bristle brush to gently loosen grit
and grime that may have collected.
•Reconnect power to the unit and ensure it is operating correctly.
Beginning of season
•Perform the cleaning procedures recommended above.
•Be certain the water lines and the heat pump are reconnected and / or drain valves
are closed.
•With the pool heater power off, start the pool filter pump. Check for possible
water leaks and be certain there is adequate water flow: 30 – 75 GPM.
•Complete your normal preparation and / or cleaning of the pool for the start of the
season.
•Turn the heat pump power on and set the thermostat to the desired temperature.
TIP: Setting the thermostat to its highest setting will not heat the water any faster
than setting the desired temperature point.
Fan Guard
Acorn Nut
Fan Motor
Mount Nut

14
•Allow the heat pump pool heater and the pool filter pump
to operate continuously until the desired pool water
temperature is reached. This is best accomplished by
removing the pool pump timer cogs (stops). This prevents
the pump from cycling off and allows for continuous
operation. To achieve optimum heating efficiency, a pool
cover should be used.
Occasional Pool Use
Heat pumps are NOT fast pool heaters. You must allow at least 48
hours before swimming for the pool to be noticeably heated.
If you are only using your pool on the weekends, it is more
economical to turn the heat pump down a few degrees and cover
the pool. When you are ready to swim again, it will require less
energy and time to regain a preferred temperature.
If you are not planning on swimming for a month or longer, you may choose to turn the
heat pump off. In this instance, it is recommended that the heat pump be drained of pool
water and bypassed.
Summertime Shutdown
During the summer months, when the heat pump is not needed, you can shut the unit off.
In this instance, it is recommended that the heat pump be drained of pool water and
bypassed. It is also recommended leaving the cover off as well to take advantage of solar
warming effects.
End of season (Winterizing)
Many pool service companies offer “winterizing” assistance. We recommend using
them for this procedure.
•Perform the cleaning procedures recommended above.
•Disconnect the power supply (usually at the circuit breaker in your house).
•If you are closing the pool for the winter, BE ABSOLUTELY CERTAIN TO
DISCONNECT THE HEAT PUMP FROM THE UNIONS AND DRAIN ALL
WATER LINES. As an alternative, you may prefer to fill the water lines with a
suitable antifreeze solution. Note: the water lines are best drained when compressed
air is forced through them.
•Cover the heat pump to protect it from snow and water, which could freeze and
damage the unit.
•Some heat pump owners desire their pool heated during the winter months. This is
possible when daytime temperatures are above 50°F (10°C). If nighttime
temperatures fall below freezing be certain to keep the pool filter pump
operating continuously during this time to prevent freeze damage.
It will take several
days of continuous
operation for your
pool to heat up to
temperature. The
exact length of
time will vary
depending on pool
size, ambient
temperature, wind
speed, and use of a
cover.

Heat Pump Pool / Spa Heater Owner’s Manual
15
Service Procedures
Before You Call For Service
If there appears to be a problem, refer to the troubleshooting guide on the following
pages. There is an additional troubleshooting chart available at the end of the installation
manual containing information for troubleshooting your heat pump.
1. Make sure that the swimming pool filtration system is turned on.
2. Is the main power (circuit breaker) on?
3. Is the "Power" indicator light illuminated?
4. Is the heat pump thermostat set at a high enough level to enable the system to turn on? Adjust the
thermostat to a higher setting.
5. Check the outside temperature. HAYWARD heat pumps will not turn on when the outside air
temperatures drop near 45 degrees.
6. Make sure that the pump and skimmer baskets are free of debris. Also ensure that the pool filter is clean
and supplying proper water flow to the heat pump.
7. The heat pump is not able to maintain your desired temperature? Depending on the time of the year, you
may need to adjust your pool filtration systems hours of operation (increase run time).
Note: Use a solar blanket/cover on the surface in order to keep a higher level of heat retention.
Heat Pumps with Electronic Displays
1. If diagnostic code "PS" is illuminated, this indicates improper water flow. Ensure that pool filter pump
basket, skimmer basket, and filter are free of debris and clean.
2. If diagnostic code “LP” is illuminated, this indicates that the outside air temperature is too low. When
this occurs the Heat Pump shuts itself off automatically. When the outside air temperature rises enough the
heat pump will automatically turn on.
3. If diagnostic code "HP" is illuminated, this indicates that a low water flow condition may exist. Check to
see that the pool pump basket, skimmer basket and pool filter is clean. After checking these items, if the
"HP" indicator is still illuminated contact HAYWARD for service.

16
Troubleshooting
Check the installation of the heat pump first to assure it is installed per the installation manual. Ensure the
electrical hook-up is correct by checking the breaker is sized correctly for your unit and the wiring is per
the National Electric Code. Reference the installation manual to ensure that the plumbing is installed
correctly.
Circuit Breakers: if you suspect that a circuit breaker may be tripped, turn the breaker to the “off”
position and then back to “on”. Visually checking the breaker is “on” is inadequate, as some switches
move only a short distance when they trip. Toggle the switch to “off” then “on” every time you suspect it
is tripped.
Troubleshooting a Chiller model
or cooling cycles of a heat/cool unit: If you are troubleshooting problems with a Chiller model or
cooling cycles of a heat/cool unit, the following charts cover
the majority of issues. If you are unable to resolve or
determine a problem, additional info can be obtained by
contacting the HAYWARD Service Dept.
Troubleshooting Guide for MECHANICAL Thermostat Control
Problem Possible Cause Possible Solution(s)
No power to unit Make sure power is on.
Breaker is thrown Check the breaker / see note above
Thermostat not turned up high enough Turn thermostat up until unit comes on
5 minute delay timer still running Be sure the 5 minute delay has passed
Make sure filter is clean
Make sure filter pump is on
Low water flow
Unhook cleaning devices (skimmers, crawlers, etc.)
Heat pump is not running
(Note: the pool filter pump
must be running before the
heat pump will operate.)
Outside temperature to low Check outside ambient temperature / wait for warmer
temperatures for unit to operate. (refer to Operating Principles)
Fan not functioning Call HAYWARD for service info.
Make sure thermostat is high enough Adjust thermostat for higher heating temperatures.
Refer to page 7 to find your thermostat instructions.
Heat pump running
but not heating
“Heat” or “RUN” does not come on. System Component failure. Call HAYWARD for service info.
Thermostat set too high Turn thermostat down
Heat pump runs continually Electrical component failure Turn off the filter pump. If the unit is still running after 2 minutes,
turn off the power to the unit and contact HAYWARD for service.
Bad valve or improper water flow
Check valve settings and ensure water flow is sufficient
(is the filter pump running continually?) If heat pump continues
to cycle, turn unit off to prevent compressor damage.
Low refrigerant, low ambient temp,
or high humidity with low ambient temp
Check evaporator coil for severe frost. Turn unit off to prevent
compressor damage.
Heat pump is cycling
(on / off too quickly)
If heat pump continues to cycle, turn unit off to prevent
compressor damage.
Condensation This is normal and there is no reason to be concerned
Water coming from bottom of unit Possible water leak
Turn the unit off for at least 2 hours, but leave the filter pump
running continuously. If water dries up then it is only
condensation. Otherwise there is a possible leak.

Heat Pump Pool / Spa Heater Owner’s Manual
17
Troubleshooting Guide for DIGITAL Thermostat Control
Lights
Heat
(green)
Power (red)
PST-1 & PST-4
only
Run (green)
Display
Problem
Possible
Cause Solution
No power to heat pump Tripped circuit breaker/ no
power supply
Check breaker and insure that the unit is properly
installed.
(blank)
Faulty electrical component Call HAYWARD service department for info.
•• Call HAYWARD service department for info.
•High / Low Pressure Switch Outside temperature too
cold.
Check ambient temperature, if lower than 50 F,
Unit will not run
Check water flow to heat pump. .
Clean your filter
. Make sure all valves are open and bypass valve
is closed.
Ensure pool filter pump is on
Normal operation for TCO function
•PS Water Pressure Switch Low or no water flow
Turn off fountains, crawlers, etc.
Outside temperature too
cold. (Refer to page 7.)
Check ambient temperature. Wait for warmer
temperature (refer to page 7.)
Loss of refrigerant Call HAYWARD service department for info.
Switch failure Call HAYWARD service department for info.
Fan motor failure Call HAYWARD service department for info.
Coil obstruction Call HAYWARD service department for info.
Perform cleaning procedures described in this
manual.
•LP Low Pressure Switch
Air flow obstruction
Call HAYWARD service department for info.
Check water flow to heat pump. .
Clean your filter
. Make sure all valves are open
Low water flow
Ensure pool filter pump is on
Set unit to “ACP” if you have the heat / cool
option.
Refer to text on PST-5 control board.(pg 12)
Check pool temp. Wait until pool needs heat.
High water temp
Call HAYWARD service department for info.
Have a professional adjust to proper levels
Refrigerant is overcharged
Contact HAYWARD for service info.
Switch Failure Contact HAYWARD for service info.
•HP High Pressure Switch
2-speed filter pump Make sure speed is set to “high”
SF
•120
Temperature sensor Failure Contact HAYWARD for service info.
•888 Thermostat reset Normal operation Temporary display. Shows for 1-2 secs when the
unit is first turned on.
•C=1 Internal board identification Temporary display. Appears intermittently. Ignore
unless it does not disappear.
Refer to owner’s manual of the remote device.
•RHD Remote device is
controlling the unit. If you do not have a remote device connected, call
HAYWARD for service info.

18
MANUFACTURER'S LIMITED WARRANTY
HEAT PUMP POOL HEATERS
Energy Utilization Systems, Inc. (HAYWARD) warrants to the original installed location, the
HAYWARD heat pump pool heater to be free of defects in materials and workmanship for a period of
five years. The compressor part has a limited ten-year warranty, a pro rata basis for years 6-10. This
warranty covers the cost of parts and labor for five years and starts from the date of purchase or within
six months of date of manufacture, whichever is first. HAYWARD will not void this warranty due to
improper pool water chemistry. This warranty is valid only if the product is installed according to the
HAYWARD specifications. This warranty is valid only for products sold for use within the state of
Florida. Products sold for use outside the state of Florida have a warranty of five years for all parts and
one year for labor. Warranty outside of Florida does not include refrigerant or other expendable
materials. Note: Lil’ HotSpot, HotSpot, and SunSpot units have 5-year parts warranty and 1-year labor
warranty everywhere.
This warranty does not include services such as inspection, maintenance, or unnecessary service calls
due to erroneous operational reports, external valve position, or electrical service. It also does not
include the repair or damage due to negligence, accident, or other conditions beyond the normal
intended use of the unit. This warranty is void if the product is repaired or altered in any way by any
persons or agencies other than those authorized by HAYWARD, and is in lieu of all other warranties,
expressed or implied, written or oral. There are no implied warranties of merchantability or fitness for a
particular purpose that apply to this product. This warranty applies only within the continental USA. For
warranty outside the continental USA, contact HAYWARD.
At its option, HAYWARD will replace or repair any HAYWARD part that proves defective if such
parts are returned to our factory, freight collect, within the warranty period. It is agreed that such
replacement or repair is the exclusive remedy available from HAYWARD. Unless authorized by
HAYWARD and performed by a factory authorized service center, HAYWARD is not liable for any
labor involved in the removal of defective parts or the installation of replacement parts. HAYWARD is
not liable for damages of any sort whatsoever, including incidental and consequential damages. Parts
returned and services performed under terms of this warranty must be approved by HAYWARD. All
parts returned under terms of this warranty will be repaired or replaced and returned transportation
charges prepaid, by best and most economical means.
This warranty applies to units shipped after July 1,2002.

Heat Pump Pool / Spa Heater Owner’s Manual
19
Installation
Guide
Receipt Inspection of Unit………………………………………………………10
Determining Optimum Location……………………………………………….10
•Refer to Section II in the Owners’ Manual………………………10-12
Electrical Connections…………………………………………….…………….21
•Model Specifications………………………………………………...21
•Wiring Recommendations…………………………………………...22
•Wiring Diagrams…………………………………………………23-25
Plumbing Specifications………………………………………………….……..26
•Typical Installation Layout………………………………...……..27
•Flow Rate…………………………………………………………28
•External By-pass………………………………………………….28
•Unions…………………………………………………………….28
Installation of Pool Heater Above Pool Surface……………………….………28
Installation of Pool Heater Below Pool Surface…………………….…………28
Installation of Multiple Heat Pumps……………………………………….…..29
Installation in Combination with Solar or Gas Heaters…………………..…..30
Initial Start-Up…………………………………………………………………..31
Connecting to Remote Systems………………………………………..……32-33
Connecting the TCO…………………………………………………………34-35
Trouble Shooting Guide……………………………………………………..36-37
•Refer to Section IV of the owners manual……………………17-18
Obtaining Service……………………………………………………………16, 38