All Alarms And Warning Windows - Worcester GREENSOURCE User Manual

All alarms and warning windows

An alarm can sometimes occur temporarily due to various reasons. However, there is never
a risk involved in resetting an alarm. All the alarms that can appear in the menu display are
described in this section. The descriptions give you an idea about the nature of the alarm
and what you can do to rectify it.
The alarm log (see Advanced menu) shows the alarms and warnings that have occurred.
List of all alarms:
Tripped low pressure switch
Tripped high pressure switch
Sensor failure / short circuit
Faulty function in 4-way valve
T6 High hot gas temperature
Error on electric additional heat
Fault on additional heat for heating system
T8 High flow temperature
Low temperature in condenser
Tripped motor cut-out compressor
Tripped motor cut-out fan
Alarm window
Tripped low pressure switch
Possible cause 1: The evaporator is clogged.
Action: 1. Clean the evaporator. See Maintenance.
2. Select Acknowledge.
3. Wait for the heat pump to start.
4. If the fault returns, contact your installer.
Possible cause 2: Blocked fan.
Action: 1. Remove any items that are blocking the fan.
2. Select Acknowledge.
3. Wait for the heat pump to start.
4. If the fault returns, contact your installer.
Possible cause 3: Lack of refrigerant in the refrigerant circuit.
Action: 1. Select Acknowledge.
2. Wait for the heat pump to start.
3. If the fault returns, contact your installer.
Possible cause 4: Fault in the automatic defrost system or fan motor.
Action: 1. Select Acknowledge.
2. Wait for the heat pump to start.
3. If the fault returns, contact your installer.
Possible cause 5: Fault in the expansion valve.
Action: 1. Select Acknowledge.
2. Wait for the heat pump to start.
3. If the fault returns, contact your installer.
List of all warning windows:
Is the heat pump fused for this output?
High temperature difference heat
transfer fluid
The heat pump is now working at its
highest permitted temperature
Additional heat is now working at its
highest permitted temperature
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What to do if a fault occurs