Observation:
Select appropriate error code:
| CODE / | FAULT DESCRIPTION | ||
| A 01 | IGNITION LOCKOUT | E 00 | TEMPORARY FAULT |
| A 02 | HEAT EX MONITORING FAULT | E 01 | SYSTEM PRESSURE TOO HIGH |
| A 03 | OVERHEAT LOCKOUT | E 03 | FLOW TEMPERATURE HIGH |
| A 04 | OVERHEAT OR GAS VALVE FAULT | E 04 / E 06 | FLOW SENSOR FAULT |
| A 05 | SAFETY RELAY FAILURE | E 07 / E 08 | DHW SENSOR FAULT |
| A 07 | IGNITION LOCKOUT | E 20 | FALSE FLAME DETECTED |
| A 15 | PRESSURE SENSOR FAULT | E 21 | REVERSE POLARITY |
| A 19 | FALSE FLAME AFTER DEMAND | E 22 | INCORRECT MAINS FREQUENCY |
| A 20 | FALSE FLAME DURING IGNITION | E 29 | FAULT IN LINK ON JP11 |
| A 27 | FLUE SENSOR FAULT | E 40 / E 41 | RETURN SENSOR FAULT |
| A 33 | FAN SPEED INCORRECT | E 42 | INTERNAL FAULT |
