ERROR
CODE
ERROR DESCRIPTION CHECKS
1P9 Water pressure dynamic check Check 230V to pump
Check pump is spinning via de-blocking centre screw
Check PWM pump connection pins, cable and PCB connection CN9
109 Pressure > Pmax Check water pressure on analogue gauge
Take any excess water out of the system
Check expansion vessel air pressure with boiler drained of water
110 Send Probe Damaged Check the sensor not short or open circuit
Check wiring harness connections between sensor & PCB
112 Return Probe Damaged Check the sensor not short or open circuit
Check wiring harness connections between sensor & PCB
114 Outdoor Sensor Damaged Look at parameter 4.2.1 & that the thermoregulation is set right
Check the sensor
Check the wiring harness for continuity
Check wiring harness not shorting to earth
Check no water leaks aecting wiring harness
Check connection on PCB are connected properly
140 Dynamic Pressure Check Failed (or no pump detection) Check 230V to pump
Check pump is spinning via de-blocking centre screw
Check PWM pump connection pins, cable and PCB connection CN9
141 CH Flow Switch open (iR Boiler) Flow switch open circuit
Check water flowing around system
Check no air lock or air in the system
201 DHW Probe Damaged (Combi or iS boilers) Check the sensor
Check the wiring harness for continuity
Check wiring harness not shorting to earth
Check no water leaks aecting wiring harness
Check connection on PCB are connected properly CN12
iS boilers should have parameter 2.2.8 - Boiler version, should be set
to no.2 Storage with thermostat where no hot water sensor is used
203 Tank Probe Damaged (iS Boilers) Cylinder sensor faulty
Check the wiring harness for continuity
Check wiring harness not shorting to earth
Check no water leaks aecting wiring harness
Check connection on PCB are connected properly Yellow plug
303 PCB Fault Check PCB
304 Too many resets Too many (> 5) resets in 15 minutes
306 PCB Fault Check PCB
309 Gas Relay check Failed Check PCB
3P9 Scheduled Maintenance - Call Service Scheduled Maintenance - Call Service
41Z Room sensor z not available Check for C/htg Zone (X) sensor faulty
501 No flame detected
Check gas supply and flue system correct (in. condensate)
Check connection between gas valve and PCB
Check connection between spark generator and PCB
Check connections between spark generator and electrode
Check sensing lead connection between electrode and PCB
502 Flame detected with Gas Valve closed (False flame)
504 Flame lift
5P1 1st Ignition Failed
5P2 2nd Ignition Failed
5P3 Flame lift
612 Fan error (fan does not start up) Check fan and cable
46
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