EngA DJM3

A DJM3
IOM-17 7 of 27 Mar 99 R3
DIPSWITCHES
TheDJM3optionsareconfiguredbyDIPswitchselectionand/orwiringconnections.
TABLE2
DIPSW Description
1 EnableVdcormAtemperatureresetifON.
2 EnableambientresetifON.
3 Enableroom/returntemperatureresetifON.
4 Notused.
5 Servicemode(mustbeleftOFFfornormaloperation).
6 Notused.
7 ConstantcombustionairpurgemodeifON.
8 EnablelowlimitdischargetemperaturesensingifON

Note:TheDJM3willonlyacceptonetypetemperatureresetsignal.

INDICATIONANDDIAGNOSTICLIGHTS
Thereare4statuslightsontheDJM3labeled1to4.Theyoperatein4patterns:constanton,2second
flash(onfor1second,offfor1second),1secondflash(onfor½second,offfor½second)andan
irregularflash(flashestwice,thenoff,repeat).
TABLE3
LIGHT LEDON 2SECFLASH 1SECFLASH INTFLASH
1 LLLOCKOUT LLBYPASS DSENOPEN ‐‐‐‐‐‐‐‐‐‐
2 PREPURGE PPPROBLEM ‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐
3 HEATCALL HTSWOPEN ‐‐‐‐‐‐‐‐‐‐ SERVICEMODE
4 IGNENABLE ‐‐‐‐‐‐‐‐‐‐ FLAMEFAIL ‐‐‐‐‐‐‐‐‐‐


1 ON
Theappliancehasbeenshutdownduetolowlimitfailureandlockout.
(dischargetemperaturebelow4°C(40°F))Resetwiththeserviceswitch.
Normaloperatingstatus:OFF.
1 2SEC
Unithaslowdischargetemperatureandistimingout.Ifthetemperaturedoes
notrecovertoabove4°C(40°F)itwillshutdownandlockout.
Normaloperatingstatus:OFF,orwaitingforthedischargetemperaturetorise
above4°C(40°F).
1 1SEC
Thedischargesensorcircuitisopen(sensorrangemustbebetween880and
4000Ω).
Normaloperatingstatus:OFF.
2 ON
Thecombustionblowerispurgingtheexchangerasapreliminarytoignition.
Normaloperatingstatus:EITHERONorOFF.
2 2SEC
PrePurgeproblem.TheDJM3isnotreceivingacorrectsignalfromthehall
effecttachometersensor,intoterminalsYS,OS,GS.
Normaloperatingstatus:OFF.