Ochsner TERRA 6, Operating And Installation Manual

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INSTALLATION | Troubleshooting
982001-TERRA-M2-M4-EN04.1 | www.ochsner.com 39
12. Troubleshooting
i Information
Resolving faults and making changes to settings
on the heat pump system may only be carried out
by qualified contractors. Standard settings for the
controller are set by OCHSNER Customer Service
as part of the commissioning process. The system
user and contractual partner is responsible for any
further corrections and settings to programs.
Problem Cause Solution
Too little DHW is available or
the central heating system is
too cold.
The power supply to the appliance
has been cut off.
Check the safety device on the main distributor board for your house.
Switch the safety device back on. If the safety device triggers again after
being switched back on, contact a qualified contractor or OCHSNER
Customer Service.
The appliance is leaking
water.
The drain for the safety valve is
blocked.
Clean the safety valve drain.
The heating system does not
heat up, no fault message.
PSU shutdown Check individual room controls, vent the heating circuit, open valves,
check heating circuit circulation pump, increase the output level of the
heating circuit circulation pump, check fuses
Energy transfer to the heating circuits
is interrupted or too low
Power failure
DHW priority
The heat pump is only
producing DHW and is not
providing heating, or is doing
so 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 time clock
DHW heat exchanger scaled up Notify heating contractor, clean heat exchanger, descale
DHW temperature is not or is
no longer being reached.
Heat exchanger for DHW is too small. Increase size of heat exchanger
Heat exchanger is scaled up
Descale heat exchanger
Sensor incorrectly positioned Correctly position sensor
Pipework too small Install pipes with larger diameters
Faulty DHW sensor Replace DHW sensor
DHW charging pump is faulty Replace DHW charging pump
DHW charging pump output level set
too low
Set higher output levels
3-way switching module is faulty Replace 3-way switching module
Heat pump runs continuously
but yields only low tempera-
tures, and there are traces of
oil in the appliance.
Refrigerant leak, refrigerant line not
leak tight
Switch off heat pump, notify OCHSNER Customer Service
Flow rate too low The minimum flow rate at the heat
pump is not being reached.
System pressure too low: check pressure maintenance equipment. Buffer
charging pump is faulty, 3-way switching module is faulty
12.1 Fault messages on the master controller
► In the event of a fault, the relevant fault messages will
be displayed on the controller as “Er XXX”.
► If the high limit safety cut-out is triggered, this will
not be displayed with a fault message on the master
controller.
In the following table, the possible fault messages are listed
together with the associated code or fault history code.
Fault messages with an associated fault history code are
stored and can be read off again later, even when no fault
is present. Stored fault messages are listed in the “Service
Report” menu under the “Error data” submenu.