Alarm listAlarm codes are given as a result of a fault or when important information should be provided to theuser.Alarms fall into the following categories:C Critical: Running or partially stopped as long as the alarm is active.W Warning: Becomes critical if the situation is not improved within a reasonable period.I Informative: Normal operation not affected. The alarm will disappear when the user cancels it.Alarm code Category Display text Description/cause Fault correction0 -- -- No alarm1 C HARDWARE Fault in control system hardware Contact service if cancellationdoes not help2 C TIMEOUT Warning alarm (W) has become acritical alarmNote alarm and reset.Contact service if alarm does notdisappear3 C FIRE Fire thermostat. Units stoppedbecause fire thermostat is activeIf there has been no fire, contactservice7 C FROST1. Frost protection of heater:Intake air passing over heateris too cold. Can be due tobypass damper being open.2. District/central heating watertoo cold (e.g. oil-fired boilerstopped)1. Close bypass damper, activateheater, reset alarm.2. Check heating supply tocomfort heater is OK.Reset alarm when faultcorrected.8 C Tx SHORT One of the temperature sensorshas short-circuited or is faultyNote which sensor, Tx , has short-circuited, e.g. T1 short and contactservice9 C Tx OPEN One of the temperature sensorshas been disrupted or is faultyNote which sensor, Tx , has beendisrupted, e.g. T1 disrupt andcontact service10 C OVERHEATElectrical heater overheated.Insufficient air flow due to e.g.blocked filters, blocked air intakeor faulty intake fanCheck air is being blown into thehome.Check filter and air intake.Reset alarm.Contact service if the above doesnot help11 C AIRFLOW Insufficient airflow at intake.See alarm code 10. See alarm code 10.15 W ROOM LOWWhen the room temperature isunder 10°C the unit will stop toavoid further cooling. This can befor a period when the house isunoccupied and the heating isswitched off.Heat up the house and reset alarm16 I SOFTWARE Fault in control system program Contact service17 I WATCHDOG Fault in control system program Contact serviceComfort 200 Top (English) BY NILAN9