Glow-worm Envirosorb3 - Manual (Page 36)

Appendix
36 Installation instructions Envirosorb₃ 0020154078_03
Code Meaning
72 Fault: Inverter overcurrent
73 Fault: Inverter voltage too low
74 Fault: Inverter voltage too high
75 Internal inverter fault message
76 Fault: Inverter heat sensor
77 Fault: Inverter overload
78 Fault: Fan Management Unit PCB
79 eBUS communication error
80 Fault: Flow rate
81 Communication error with inverter
82 Fault: Maximum compressor current
84 Fault: Electronic expansion valve
85 Fan speed too low
88 Coding resistance fault
89 Fault: Underfloor protective circuit
90 Fault: 4-way valve
99 Fault with the product: Take note of the fault codes.
E Overview of fault codes
Code Meaning Cause
37 The fan speed is too low. – Obstruction in the product's air guiding
– Fan motor not connected or faulty
– Power supply to the fan PCB is faulty
42 Fault: Coding resistance – The product's coding resistance is missing or is faulty
– Coding resistance value outside the permissible range
86 Safety thermostat for the underfloor heating triggered – Underfloor heating temperature too high
– Heating circuit flow rate too low
– Underfloor heating circuit is closed
103 Fault: Spare part detection – The main PCB that is fitted as a spare part or the inverter does
not match the product
514 Sensor fault: Comp. inlet temp.
– Sensor is faulty or incorrectly connected to the main PCB
517 Sensor fault: Comp. outlet temp.
519 Sensor fault: Return temperature
520 Sensor fault: Flow temperature
526 Sensor fault: Heat exchanger temp. Sensor is faulty or incorrectly connected to the main PCB
532 Building circuit: Flow rate too low – Pump faulty
Check the specific flow rate in forced mode
– Between 7000 and 7700 l/h: Alarm
– Between 7700 and 8200 l/h: The pump runs dry (no water in
the heating circuit; the heating circuit loses water)
– Between 8200 and 8700 l/h: Fault in the electronics
– Between 8700 and 9200 l/h: Pump blocked
– Between 9200 and 10,000 l/h: No PWM signal (cable faulty
or not connected; fault in the main PCB)
– Pump cabling has not been carried out correctly (PWM and sup-
ply)
– Low water pressure
– Dirt filter in the heating circuit return is missing or blocked
– Heating circuit not fully purged
– Pressure loss in the heating circuit too high