Mr. Heater MH50KR Instrucciones De Funcionamiento Y Manual Del Propietario página 6

dIaGnOsTIC saFeTY sHuTdOwn and TrOuBle sHOOTInG
Model­MH125KTr, MH175KTr and MH210KTr­heaters­are­equipped­with­a­diagnostic­control­board­and­flashing­LED­error­indicator.­This­
flashing­LED­signals­indicate­unit­operation­status.­See­the­following­diagnostic­guide­for­unit­status­and­corrective­action­if­necessary.
led uNIT OpERATION
Steady­ON System­Check
Steady­OFF Operation­OK
2­Flashes No­flame­detected
3­Flashes High­limit­switch­
failure
4­Flashes CAD­Cell­Failure
Power­Light Power­to­control
Model­MH50Kr and MH75KTr heaters­are­NOT­equipped­with­a­diagnostic­control­board­or­flashing­LED­error­indicator.­See­the­following­
troubleshooting­guide­for­unit­status­and­corrective­action­if­necessary.
sYMPTOM
High­limit­switch­Open­Circuit­
Sparks,­calling­for­flame,­but­
no­or­slow­motor­operation­
­ ­
­ ­
­ ­
­ ­
­ ­
­ ­
­ ­
No­Spark­ ­
­ ­
­ ­
­ ­
­ ­
Abnormal­Motor­Operation­-­
Motor­overheats­or­Stops­
­ ­
­ ­
­ ­
­ ­
Unable­to­Detect­Flame­
­ ­
­ ­
­ ­
­ ­
­ ­
­ ­
­ ­
­ ­
Flame­Control­Failure­
­ ­
Mr. Heater, Inc. | Kerosene Forced Air Heater
TrOuBle sHOOTInG
System­performing­self­test.­No­action­required.
No­action­required.
Heater­fails­to­start­during­the­first­30­sec.­of­operation.
1.­ Check­wiring­to­motor­(per­wiring­schematic­in­manual).
2.­ Make­sure­that­the­pressure­gauge­is­in­place­and­not­damaged.
3.­ Adjust­pressure­for­proper­heater­operation­per­manual.
4.­ With­heater­disconnected­from­AC­source,­rotate­fan­clockwise­to­verify­motor­is­free.
5.­ Remove­air­filter­housing­from­motor­and­inspect­the­pump­rotor­for­damage.­If­damaged,­replace­rotor­assembly.
6.­ If­wiring­is­correct,­pump­rotor­is­okay,­and­motor­is­not­rotating­freely,­replace­motor­or­power-pack­assembly.
7.­ If­problem­persists,­replace­oil­flame­control­assembly.
8.­ Check­for­spark­arching­from­the­electrode­assembly­(ref.­50),­to­the­combustion­cylinder­(ref.­39).
9.­ Check­the­cad­cell­(ref.­38)­for­continuity.
1.­ Make­sure­heater­is­cooled­off,­press­reset­switch­and­retry.
1.­ Check­wiring­to­cad­cell­(per­wiring­schematic­in­manual).
2.­ Clean­cad­cell­photo­cell.
•­ Slide­cad­cell­out­of­cad­cell­holder.
•­ Push­the­photo­cell­out­of­the­black­rubber­cad­cell­housing­by­pushing­on­the­2­purple­wires.
•­ Clean­the­photo­cell­with­a­soft­cloth­and­rubbing­alcohol.
•­ Pull­the­photo­cell­back­into­the­cad­cell­housing­and­reinstall­into­holder.
•­ Test­heater.
3.­ If­the­heater­still­does­not­operate,­replace­cad­cell.
4.­ Replace­oil­flame­control­assembly.
1.­ Sensing­power.­No­action­required.
TrOuBle sHOOTInG
1)­ Make­sure­heater­is­cooled­off,­toggle­switch­to­"OFF"­position,­wait­5­minutes­and­retry.
1)­ Check­wiring­to­motor­(per­wiring­schematic­in­manual).
2)­ Make­sure­that­the­pressure­gauge­is­in­place­and­not­damaged.
3)­ Adjust­pressure­for­proper­heater­operation­per­manual.
4)­ With­heater­disconnected­from­AC­source,­rotate­fan­clockwise­to­verify­motor­is­free.
5)­ Remove­air­filter­housing­from­motor­and­inspect­the­pump­rotor­for­damage.­If­damaged,­replace­rotor­assembly.
6)­ If­wiring­is­correct,­pump­rotor­is­okay,­and­motor­is­not­rotating­freely,­replace­motor­or­power-pack­assembly.
7)­ If­problem­persists,­replace­oil­flame­control­assembly.
8)­ Check­for­spark­arching­from­the­electrode­assembly,­to­the­combustion­cylinder.
9)­­ Check­the­cad­cell­for­continuity.
1)­­ Check­length­and­gage­of­extension­cord­for­proper­amp.­draw.­(Check­requirements­on­page­4.)
2)­ Check­wiring­to­igniter­(per­wiring­schematic­in­manual).
3)­ Check­gap­between­electrode­probes­(2.3­-­3­mm).
4)­ Still­no­spark,­replace­igniter­assembly.
5)­ Replace­oil­flame­control­assembly.
1)­ Motor­speed­too­low­(Motor­should­operate­at­3450rpm)­-­Replace­motor.­
2)­ With­heater­disconnected­from­AC­source,­rotate­fan­clockwise­to­verify­motor­is­free.
3)­ Remove­air­filter­housing­from­motor­and­inspect­the­pump­rotor­for­damage.­If­damaged,­replace­rotor­­
­ assembly.
4)­ If­wiring­is­correct,­pump­rotor­is­okay,­and­motor­is­not­rotating­freely,­replace­motor­or­power-pack­assembly.
5)­ Replace­oil­flame­control­assembly.
1)­ Check­wiring­to­cad­cell­(per­wiring­schematic­in­manual).
2)­ Clean­cad­cell­photo­cell.
­ a)­­ Slide­cad­cell­out­of­cad­cell­holder.
­ b)­­ Push­the­photo­cell­out­of­the­black­rubber­cad­cell­housing­by­pushing­on­the­2­purple­wires.
­ c)­­ Clean­the­photo­cell­with­a­soft­cloth­and­rubbing­alcohol.
­ d)­­ Pull­the­photo­cell­back­into­the­cad­cell­housing­and­reinstall­into­holder.
­ e)­­ Test­heater.
3)­ If­the­heater­still­does­not­operate,­replace­cad­cell.
4)­ Replace­oil­flame­control­assembly.
1)­ Check­wiring­in­heater­(per­wiring­schematic­in­manual).
2)­ Replace­oil­flame­control­assembly.
E-6
Operating Instructions and Owner's Manual