ESIE13-03
|
Part 2. Troubleshooting
2. Error code based troubleshooting
Page 24
13/05/15
|
Version 2.0
Ground source heat pump
2.12. “E7” – Brine flow error
Refrigerant circuit is clogged (HP - LP
> 0,26 MPa).
Check for possible blockage (blockages
can be checked by measuring the refriger-
ant/pipe temperature. Sudden drop in
temperature could indicate a blockage
(remark: this is not valid for the expansion
valve)).
Faulty compressor.
Check compressor (see
).
Replace compressor and also investigate
reason of breakdown.
Check expansion valve operation (liquid
back issue).
Check refrigerant shortage (overheated
issue) -> check for leak.
Stop valve is closed.
Check if stop valve is open.
Open stop valve.
Compressor wiring is wrong.
Check wiring.
Correct compressor wiring.
Compressor turned off too fast.
Wait for guard timer to pass (3 minutes)
Faulty inverter voltage output.
Check if inverter output voltages have
same apmlitude.
Replace inverter PCB A10P (see
).
Faulty inverter PCB A10P.
Check inverter PCB A10P.
Replace inverter PCB A10P (see
) when required.
Faulty expansion valve.
Check expansion valve (see
Replace expansion valve (see
).
Trigger
Effect
Reset
Brine flow is below 25 l/min for 15 sec-
onds (when having low brine temp (< 0°C)
at start up the trigger timer can increase
up to 60 seconds).
Unit will stop operating.
Via user interface.
Possible cause
Check
Corrective action
Closed valve in brine circuit.
Check if all valves are open.
Adjust / open valve.
Brine pressure is too low.
Check the brine pressure on the pressure
gauge (PG1).
Increase brine pressure till ~2 bar. Refer
to the Installer Reference Guide.
Check for possible brine leak.
Static pressure of brine circuit is too high.
Check the static pressure of the brine cir-
cuit.
Correct brine field circuit. Refer to the
Installer Reference Guide or to the Data
Book (for pump characteristics).
Brine field piping is blocked.
Check for possible blockage (blockages
can be checked by measuring the refriger-
ant/pipe temperature. Sudden drop in
temperature could indicate a blockage
(remark: this is not valid for the expansion
valve)).
Brine filter is blocked.
Check brine filter.
Clean brine filter (see
Check brine quality and possible source
of dirt.
Faulty flow switch / refrigerant/brine PCB
A9P.
Check flow switch (see
).
Replace flow switch (see
) or
replace PCB A9P (see
).
If flow switch failed due to contamination,
check for source of contamination and
consider to install an additional filter.
Faulty brine pump / refrigerant/brine PCB
A9P.
Check brine pump (see
).
Replace brine pump (see
) or
replace PCB A9P (see
).
If brine pump failed due to contamination,
check for source of contamination and
consider to install an additional filter.
Содержание EGSQH10S18AA9W
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