Protection/Failure
Protection for over-big temp.
difference between water
inlet & outlet
Standby status
Running status
Inlet water temp. sensor failure
Ou tlet wa ter temp . sensor failure
Coil 1 temp. sensor failure
Ambient temp. sensor failure
Ant i-freeze pr ot ection for coo ling
Winter anti-freeze protection
Ⅰ
Winter anti-freeze protection
Ⅱ
Wire
controller
PP1
PP2
PP3
PP4
PP6
PP7
PP7
PP7
Running
/
Failure
indicator
Off
On
☆●
(flashes once & stops)
☆☆●
(flashes twice & stops)
☆☆☆●
(flashes 3 times & stops)
☆☆☆☆☆●
(flashes 5 times & stops)
Defrosting
No display
☆☆☆☆☆☆☆☆……
(flashing continuously)
On
On
Off
Off
Coil 2 temp. sensor failure
☆☆☆☆●
(flashes 4 times & stops)
PP5
High / Low pressure protection
☆☆☆☆☆☆☆☆☆●
(flashes 9 times & stops)
EE4
SWIMMING POOL HEAT PUMP
SWIMMING POOL HEAT PUMP
Check
Solution
1. Check
the
connection of inlet
water sensor
.
2. Check if the sensor is broken
.
1. Reconnect the sensor.
2. Replace the sensor
.
1. Check the connection of inlet
water sensor
.
2. Check if the sensor is broken
.
1. Reconnect the sensor.
2. Replace the sensor.
1. Check the connection of inlet
water sensor
.
2. Check if the sensor is broken
.
1. Reconnect the sensor.
2. Replace the sensor.
1. Check the connection of inlet
water sensor
.
2. Check if the sensor is broken
.
1. Reconnect the sensor.
2. Replace the sensor.
1. Check the connection of inlet
water sensor
.
2. Check if the sensor is broken
.
1. Reconnect the sensor.
2. Replace the sensor.
1. Check if there is any jam in the
water circuit
.
2. Check if the water flow volume
is enough.
3. Check if the water pump has
failed
to
work
.
1. Remove the jam.
2. Increase the water
flow volume.
3. Repair or replace the
water pump.
Refer to PP 6.
Refer to PP 6.
Water flow switch failure
EE3
☆☆☆☆☆☆☆☆●
(flashes 8 times & stops)
1. Check if wiring connection of
flow switch is in position.
2. Check if enough water flow.
3. Check if flow switch is broken.
4. Check if water pump failure.
1.Reconnect the wiring.
2.Increase enough water
flow.
3.Replace flow switch.
4.Repair or replace water
pump.
1. Check if
high
or
low pressure
switch
is
broken
2. Check if lack of refrigerant
.
(
For low pressure
)
3. Ambient temp. and water inlet
temp. is too low.(For low pressure
)
4. Check if there
'
s jam in water
circuit or water flow n ot enough.
(For high pressure)
5. Check if refrigerant circuit jam.
(For high pressure)
1. Replace new pressure
switch.
2. Charge enough
refrigerant.
3. Adjust less
water
flow
.
4. Remove jam or
adjust bigger water
flow.
5. Send heat pump to
dealer for detailed
check.
1. Check if there is enough water
flow volume.
2. Check if inlet /
outlet
water
temp
.
sensor
failure
.
Failure of over-big temp.
difference between water
inlet & outlet
EE5
☆☆☆☆☆☆☆☆☆☆●
(flashes 10 times & stops)
1. Adjust bigger water
flow.
2. Replace related
sensor.
Communication failure
EE8
（
Available in wire controller
）
Check the connection
Reconnect the
connection wire.
No action required
No action required
7.4 Overview of failure code on display (LED CONTROLLER)
Notes:
After water pump starts for one minute, it starts to sense water inlet & outlet temperature.
When temp. difference is over 13 degree for continuous 10 seconds, PCB will stop heat pump and controller
displays PP6; after 3 minutes, heat pump restarts, if in 30 minutes the heat pump stops 3 times for PP6,
controller displays EE5, and heat pump would only restart unless is disconnected to electricity and connect
again. When water pump is not working or in heating mode, system will not inspect protection for over-big
temp. difference between water inlet and outlet(PP6).
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