10
x
Faults and malfunctions
Tab. 10-4 Fault codes (can be detected by the PCB control panel)
"Inside Unit:" "Boiler" is shown for the location in the fault display
Code
Component/Designation
Error
Possible fault rectification
E72
Internal mixer sensor
Measured value outside measuring range,
temperature sensor defective.
●
Check cable, terminal and plug connec-
tions.
●
Replace temperature sensor.
E75
External temperature sensor
E76
Storage tank temperature
sensor
E81
EEPROM
Internal fault.
●
Total reset
●
Replace PCB control panel in controller.
E88
PCB control panel controller
E91
Connected CAN modules
CAN module bus ID duplicated.
●
Configure bus addresses correctly.
E100
Flue gas temperature
Internal fault.
●
Replace the firing unit.
E129
Pressure sensor
Measured value outside measuring range,
sensor / temperature sensor defective.
●
Check cable, terminal and plug connec-
tions.
●
Replace sensor / temperature sensor.
E198
FlowSensor
Volume flow too low.
●
Check heating circulation pump / filter /
heating network.
E200
Communication firing unit
Communication interrupted between firing
unit and controller PCB control panel.
●
Check cable and plug connections.
●
Total reset
●
Replace PCB control panel in Gas Combi
Unit 2.
●
Replace the firing unit.
W8001
FlowSensor
Volume flow fell below the minimum limit.
●
Check parameter settings (see control
system instructions).
●
Check pipes and valves for blockages.
●
Check integrated circulation pump.
E8002
Throughput under minimum threshold
(300 l/h)
W8003
Flue gas temperature
Flue gas temperature has exceeded the
threshold temperature.
●
Clean the boiler.
E8004
Flue temperature has exceeded the permissi-
ble absolute maximum value.
E8005
Water pressure
Measured value under permissible minimum
value.
●
Top up heating water.
●
Leak test.
W8006
Warning message: Maximum permissible
pressure drop exceeded.
W8007
Warning message: Measured value exceed
permissible maximum value.
●
Check diaphragm expansion vessel.
●
Drain heating water.
Summary of Contents for GCU compact 315
Page 81: ...13 x Notes 13 Notes...
Page 82: ...13 x Notes...
