Maytag POF1HD140AVFA Operations Instructions download pdf (Page 20)

FIGURE 5: UNITED TECHNOLOGIES 1168-1 ECM TAP BOARD

(POF1HD140AVFA and POF1HD091AVFA)

1168-1 ELECTRONIC FAN TIMER BOARD (EFT) DETAILED SEQUENCE OF OPERATION

Thermostat Input LEDs (LED1-5, LED8)

Six green LEDs are placed behind their respective thermostat connections (Y1, Y/Y2, G, DH, O, and W) and operate

whenever a call is present.

Thermostat calls for “W”. The 24VAC input signal is passed to pin 2 of P1 and will drive the K1 relay that provides

dedicated contacts to the T-T input of the Oil Primary Control. Thermostat calls for cool “Y1”. The 24VAC input

signal is passed to pin 6 of P1. Thermostat calls for fan “G”. The 24VAC signal is passed to pin 15 of P1.

Thermostat calls for dehumidification “DH”. The 24VAC input signal is passed to pin 10 of P1. Thermostat calls

for reversing valve “O”. The 24VAC input signal is passed to pin 9 of P1.

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Maytag POF1HD140AVFA Operations Instructions Page 20