Lennox MPB036S4M-*P - Troubleshooting and Error Codes; Quick Reference Guide - Error Codes

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20. Quick Reference Guide - Error Codes
Table 6. Single-Zone 009/012 115VAC/208-230VAC
LED Display (LED 1: Blue) Error Description
SlowFlash Standby
On Normal operation
FastFlash Outdooruniterror.
Slowash--ashingat1Hz.
Fastash-ashingat2Hz.
Table 7. Single-Zone 018/030 208-230VAC
Main Control IPM Control (comp. driver) Error Description
BlueLED RedLED GreenLED
SlowFlash OFF ON Stand-by
ON ON OFF Normal operation
FastFlash OFF ON Couldbeoneofthefollowing:
• Indoor and outdoor unit communication error.
• Outdoorunittemperaturesensorerror.
• OutdoorunitEEPROMerror
• Compressortoptemperatureswitchisopen.
FastFlash ON ON DCbusvoltageistoohighortolowprotection.
FastFlash FastFlash ON DriverEEPROMerror.
FastFlash FastFlash OFF Driverchipstart-upfailure.
FastFlash ON FastFlash Couldbeoneofthefollowing:
• Driverphaselossprotection
• Driverzerospeedprotection
• PWMsynchronizationfailure.
FastFlash OFF FastFlash IGBTover-currentorIPMover-current
FastFlash FastFlash FastFlash Controlchipcommunicationerror.
Slowash-Flashingat1Hz
Fastash-Flashingat2Hz
Table 8. Multi-Zone Outdoor Unit
Display Error Description
E0 OutdoorunitEEPROMerror.
E2 Communicationerrorbetweenoutdoorunitandallindoorunits.
E3 CommunicationerrorbetweenoutdoorunitmaincontrolandIPMcontrol.
E4 Temperaturesensorerror(outdoorcoil,outdoorambient,compressordischargeandindoorunitcoiloutlettemperaturesensors.
E5 Highandlowvoltageprotection.
E8 OutdoorDCfanspeederror.
F1 Indoor unit #1 coil outlet temperature sensor error.
F2 Indoor unit #2 coil outlet temperature sensor error.
F3 Indoor unit #3 coil outlet temperature sensor error.
F4 Indoorunit#4coiloutlettemperaturesensorerror.
F5 Indoor unit #5 coil outlet temperature sensor error.
F6 Indoor unit #6 coil outlet temperature sensor error.
P1 Highpressureswitchopen
P2 Lowpressureswitchopen
P3 Outdoorcompressorcurrentoverloadsensed.
P4 Hightemperaturesensedatcompressordischargeline.
P5 Hightemperaturesensedatoutdoorcoil.
P6 Inverter module (IPM) error.