15
REC Indovent AB, Box 37, SE-431 21 Mölndal, Sweden
|
tel. +46 31 675500
|
www.rec-indovent.se
OPERATION & MAINTENANCE
Air handling unit RT 400S-EC
REC-E08.10
Troubleshooting
1. “Filter alarm” appears in the display
and the alarm lamp comes on
a.. Replace.the.filters.and.reset.the.filter.alarm.
. as.described.in.an.earlier.instruction:.
. . see.page.9.
2. The fan (fans) is (are) not running
. a..Check.which.fan.is.not.running.on.the.display..If..
. there.is.power.to.the.unit,.continue.as.follows..
. b.. If.you.think.that.any.of.the.fans’.built-in.overheat.
. . protection.devices.have.tripped,.shut.off.the.power.
. . using.the.main.switch.on.the.unit..Wait.approx..1.
. . minute.before.you.switch.the.power.back.on.again.
. c.. Check. that. the. plug. is. fully. inserted;. both. into..
. the.wall.and.between.the.fan.motors.and.the.unit.
. d.. If.the.fan.(fans).is.(are).still.not.running,.or.if.they
. . stop.again.after.a.short.period.of.operation,.
. . contact.a.service.engineer.
. e.. Check.that.the.unit.fuse.is.unbroken...
. f.. That.the.earth.circuit.breaker.has.not.tripped.
2. Cold supply air
. a.. Check.that.the.bypass.is.not.set.to.remain.open.
. . constantly.–.set.“heat.recovery”.to.auto.mode.
. b.. Check.that.the.exhaust.air.filter.is.not.extremely.
. . dirty..–.Where.required,.replace.the.filters.
. c.. Check.that.the.afterheater.is.not.shut.off.–.set.the.
. . afterheater.to.AUTO.
. d.. Check.the.temperature.settings.as.shown.in.the.
. . instructions.earlier.on.in.this.booklet.
. e.. If.the.unit.is.fitted.with.the.Cooling.option,.
. . -.Check.its.settings.
3. Low air quantity
. a.. Check.that.the.unit.is.operational..Check.that.
. . the.relevant.fan.is.running.
. b.. Check.the.settings.for.fan.speed.“SET.MODE”.
. . –.set.to.auto.mode.
. c.. Ensure.that.no.external.regulations/switches.are.
. . affecting.the.fan.speed.
. d.. Check.the.air.intake.and.roof.hood..Clear.away.
. . any.dirt,.snow,.etc.
. e.. Clean.the.fans.and.the.heat.exchanger.where.
. . appropriate.
. f.. If.the.devices.or.duct.system.are.dirty...
.
. –.clean.if.necessary.
. g.. Check.that.the.duct.system.has.not.been.deformed.
. . (during.renovation.or.similar)
4. Water leaks
.
a.. Check.that.the.condensation.drain.is.connected.
. . to/is.able.to.discharge.to.a.floor.drain.
. b.. Check.that.there.is.no.blockage.in.the.condensation
.
.
. . pipe.from.the.unit.
. c.. Check.that.the.red.plug.inside.the.unit.service.hatch.
. . (lower.part).is.on.the.correct.side..This.should.be.on
. . the.same.side.as.the.filters..If.the.unit.is.fitted.with.a.
. . condensation.evaporator.unit.(kavk),.there.is.a.plug.
. . in.both.holes.
5. Humming or noise from the unit
.
a.. Check.whether.any.of.the.fan.impellers.is.very.dirty
. . or.otherwise.damaged.
. b.. If.any.of.the.impellers.is.dirty,.this.may.cause.
. . imbalance..–.noise..Clean.as.described.in.the.
. . instructions..
6. Text alarm + alarm lamp
HEATER ALARM
=.overheating.in.the.afterheater...
-. Reset.the.heater’s.internal.overheat.protector.by.
. switching.off.the.power.to.the.unit.for.approx..
. 3.min..Use.the.main.switch.on.the.unit..If.the.fault.
. persists,.contact.a.service.engineers..The.fans.stop.
-. Water.afterheater,.check.that.there.is.heat.in.the.system..
. and.that.the.circulation.pump.is.running..Reset.the
. alarm.by.powering.down.the.unit.using.the.main.switch
. for..approx..3.min..
-. Check.that.the.filters.are.not.full.of.dirt.and.that.the.
. outdoor.air.intake.is.not.blocked..The.extract.air.(roof.
. hood).may.also.need.to.be.checked..
-. Check.the.setting.on.the.external.thermostat.GT7.
7. Sensor Error
If.the.duct.sensor.GT1.registers.an.incorrect.or.excessively..
deviating.value,.“Sensor.Error”.is.shown.on.the.display..
The. unit. will. subsequently. stop. regulating. in. relation. to.
temperature.until.the.error.is.corrected.
The.status.of.outdoor.air..sensor.GT11.is.shown.on.the.
display.under.manual.settings..In.the.same.way,.the.value.
is.displayed.for.GT3.(exhaust.air.sensor).
