Ochsner Air Eagle 717 - 10 Troubleshooting

BA_OCHSNER AIR EAGLE_414_717_V06_EN.docx Page 50 of 76
10 Troubleshooting
Let only trained specialist personnel carry out adjustments and troubleshooting! Standard settings for the
controller are made by customer service during commissioning. The operator and contracting partner is
responsible for additional corrections and program adjustments!
Fault/display
Cause
Solution
Heating system does
not heat up,
no fault
1. PSU shutdown
2. Energy transfer to the
heating circuits is
interrupted or too low
3. Power failure
4. DHW priority
Chick individual room controls, vent
heating circuit,
open valves,
check DHW circulation pump, increase
output level of the DHW circulation pump
Check fuses
Heat pump only
produces DHW but does
not heat or heats too
late
DHW target temperature is too
high
Check the DHW target temperature
Anti-legionella mode
Use time program
Install electric immersion heater for DHW
DHW circulation hydraulics
Reduce flow rate and use timer
DHW heat exchanger scaled up
Notify heating contractor, clean heat
exchanger, descale
DHW temperature not
reached or no longer
reached
Heat exchanger for DHW is too
small
Increase size of heat exchanger
Heat exchanger is scaled up
Descale heat exchanger
Sensor positioned incorrectly
Position correctly
Pipework too small
Install larger pipes
Faulty DHW sensor
replace
DHW charging pump faulty
replace
DHW charging pump output
level set too low
Set higher output levels
3-way switching valve faulty
replace
Heat pump runs
continually and yields
only low temperature;
traces of oil in the
appliance
Escaping refrigerant
refrigerant line leaking
Switch off heat pump,
notify customer service
Er.91
insufficient flow rate
The minimum flow rate at the
heat pump is not being reached.
insufficient system pressure,
Check pressure maintaining device, buffer
charging pump faulty,
diverter valve faulty
No hot water and
heating system remains
cold.
Power failure
Check cause!
Reset circuit breaker.
Table 4: Troubleshooting