Mascot ST Tankless Water Heater
Page 51
3. Fan / Air Proving
6.2 Fault Tree Analysis
Section 6, Error Codes
4. ‘I/T’, ‘DHW’, ‘OP’ Sensor detects
Error code contents
E31 Inlet water NTC open or short
E32 DHW NTC open or short
E33 OP NTC open or short
E35 Exhaust NTC open or short
