Section 9 - Fault Finding
95
Installation and Maintenance
FAULT FINDING
9.1.2 No Water Flow, through Outdoor Unit, 10 times in succession
Is the pump feedback 0 %?
(Refer to section 5.8.7 of this
manual)
Is pump feedback 2 %?
Is pump feedback 80 %?
Is pump feedback 85 %?
The Pump is stuck in
Standby. Replace the Pump.
If the Pump has a blockage,
then remove the blockage,
otherwise replace the Pump.
Pump is in Standby,
replace pump?
Make sure that the ball valve
is in the OPEN position.
Make sure that the Flow and
Return pipework is not cross-
connected.
Make sure that the Flow and
Return pipework is not cross-
connected.
Make sure that the primary
water circuit is full of water
and that there is no air in the
system.
Make sure that the Dip
Switches on the PCB are set
correctly. Refer to Figure 67
If the electrical continuity of the wiring
assembly from the Outdoor PCB
to The Water Flow Switch is good,
replace the Outdoor PCB.
If the electrical continuity of the wiring
assembly is not good, then replace
the wiring assembly.
Check the water system, If the Pump
system with water and make sure
that it is fully vented of air. If the water
circuit is full, then replace the Pump,
and fully vent the circuit of air.
Make sure that the supply voltage is
between 170 V AC and 253 V AC.
Speak to your electricity provider.
Replace the Pump
Is pump feedback 90 %?
Is pump feedback 95 %?
Is the ball valve that is connected
to the outdoor unit, in the
CLOSED position?
Are the Flow and Return pipes cross-
connected?
the Primary Pipework clean?
Is the primary water circuit full of
water and has the water circuit been
fully vented of air?
Are dip switches on Outdoor
PCB set correctly? Refer to
Figure 55 on page 55
is there continuity across the
connections with the primary
pump running?
Is there a 240 V AC voltage
at the primary circulation
pump in the outdoor unit?
1. Make sure the 240 V AC
wiring assembly between the
Outdoor PCB and the Pump
is correctly connected.
2. If the fault does not
change, fully examine
the wiring assembly for
damage. Check for electrical
continuity.
3. Finally, if the fault does
not change, then replace the
Outdoor PCB.
1. Make sure that the low-
voltage wiring assembly from
the Outdoor PCB to the pump
is correctly connected.
2. If the fault does not change
fully examine the wiring
assembly for damage. Check
for electrical continuity.
3. Finally, if fault does not
change, then replace the
Pump.
Is the low-voltage wiring
assembly to the Pump
correctly connected?
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
YES
YES
NO
NO
NO
YES
NO
NO
NO
NO
NO
NO
NO
NO
YES
NO
NO
NO
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