Broan A230H75RT USER AND INSTALLER MANUAL

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E26

Supplymotor(driveovertemp)

STEP 1: Validate if the air exchanger is exposed to ambient temperatures

within the operating limits (see p. 4)

IfSTEP1didnot�xtheproblem,performSTEP2:Replacetheelectronic

assembly.

E32

Exhaustairow

STEP 1: Unplug the unit. Perform a visual inspection of the exhaust damper

system.Clean�lters,distributionregistersandoutsideexhausthood.Make

sure no non-return damper is installed in exhaust hood since it can freeze in

winter. Inspect ducting to ensure it is not squeezed or bent. Plug the unit.

IfSTEP1didnot�xtheproblem,performSTEP2:Removeductingofthe

supplypath.OntheLCDscreen,selectMAXtocheckiftheunitisableto

reachtheselectedow.Ifso,reviewtheductingpath.

IfSTEP2didnot�xtheproblem,performSTEP3:OntheLCDscreen,select

theMINandMAXowsettingvaluesthenresettheunit.MAXowvaluewill

displayontheLCDscreen.IfMAXowisabovedesiredMAXow,setMAX

andMINows.

IfSTEP3didnot�xtheproblem,performSTEP4:Replacetheexhaust

blower and repeat STEP 3.

IfSTEP4didnot�xtheproblem,performSTEP5:Replacetheelectronic

assembly. See also section 8.1.

E33

Exhaustmotor(driveovercurrent)

STEP 1: Unplug/plug unit.

IfSTEP1didnot�xtheproblem,performSTEP2:Removecoreandclearthe

ventilation wheel from any dirt or obstacles.

IfSTEP2didnot�xtheproblem,performSTEP3:DisconnectJ3(red)and

connect a spare blower system. If it works, replace exhaust blower.

IfSTEP3didnot�xtheproblem,performSTEP4:Replacetheelectronic

assembly.

E37

Exhaustmotor(drivefocduration)

E38

Exhaustmotor(drivespeed

feedback)

E39

Exhaustmotor(startup)

E34

Exhaustmotor(driveovervoltage)

STEP 1: Unplug/plug unit. Under and over voltage may be detected with

severein-housepowersupplyuctuationandstopthemotorforprotection.

IfSTEP1didnot�xtheproblem,performSTEP2:Replacetheelectronic

assembly.

E35

Exhaustmotor(driveundervoltage)

E36

Exhaustmotor(driveovertemp)

STEP 1: Validate if the air exchanger is exposed to ambiant temperatures

within the operating limits (see p. 4)

IfSTEP1didnot�xtheproblem,performSTEP2:Replacetheelectronic

assembly.

E40

Outside air thermistor STEP 1: Check if thermistor is well connected in connector J7A.

IfSTEP1didnot�xtheproblem,performSTEP2:DisconnectconnectorJ7A

and check if the measured resistance (thermistor connector) is within

5 Kohms to 120 Kohms. If outside the range, replace the thermistor.

IfSTEP2didnot�xtheproblem,performSTEP3:Replacetheelectronic

assembly.

E41

Distributionairthermistor

STEP 1: Check if thermistor is well connected in connector J7B.

IfSTEP1didnot�xtheproblem,performSTEP2:DisconnectconnectorJ7B

and check if the measured resistance (thermistor connector) is within

5 Kohms to 120 Kohms. If outside the range, replace the thermistor.

IfSTEP2didnot�xtheproblem,performSTEP3:Replacetheelectronic

assembly.

E42

PCBA thermistor fault

STEP 1: Replace the electronic assembly.

E43

PCBA temperature over limit

STEP 1: Validate if the air exchanger is exposed to ambiant temperatures

within the operating limits (see p. 4)

IfSTEP1didnot�xtheproblem,performSTEP2:Replacetheelectronicassembly.

E50

Wall control communication lost

STEP 1: Unplug unit, inspect wires, plug unit.

IfSTEP1didnot�xtheproblem,performSTEP2:Removewallcontrolfrom

the wall installation and test with a short cable. If it works, bring a new cable

to the wall installation location.

IfSTEP2didnot�xtheproblem,performSTEP3:Testtheairexchangerwith

a spare wall control. If it works, replace the wall control.

IfSTEP3didnot�xtheproblem,performSTEP4:Replacetheelectronic

assembly.

E51

Wall control sensor

STEP 1: Unplug unit, inspect wires, plug unit.

IfSTEP1didnot�xtheproblem,performSTEP2:Replacethewallcontrol.

E60

Protection mode

STEP1:Performgeneralinspectionoftheunit(dampers,core,�lters).

8.INSTALLER’STROUBLESHOOTING(

Cont

’

)

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Broan A230H75RT Venmar AVS HRV 231 CFM 78% SRE with Virtuo Air Technology Top ports

USER AND INSTALLER MANUAL - Page 21