Allied Lennox 4AC16LT Series Kurulum Talimatları Kılavuzu - Sayfa 17

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Mis-wired Module Indication

Green LED is not on; module

does not power up

Green LED intermittent;

module powers up only when

compressor runs.

TRIP LED is on, but system

and compressor check OK.

TRIP LED and ALERT LED

flashing together.

ALERT Flash Code 3

(compressor short cycling)

displayed incorrectly.

ALERT Flash Code 5, 6, or

7 (open circuit, open start

circuit, or open run circuit)

displayed incorrectly.

ALERT Flash Code 6 (open

start circuit) displayed for

Code 7 (open run circuit) or

vice versa.

ALERT Flash Code 8

(welded contactor) displayed

incorrectly.

506467-01

Mis-wired Module Troubleshooting

Determine if both R and C module terminals are connected. Verify voltage is present at module's R

and C terminals. Review 24VAC Power Wiring section for R and C wiring.

Determine if R and Y terminals are wired in reverse. Verify module's R and C terminals have a

constant source. Review 24VAC Power Wiring section for R and C wiring.

Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at contactor coils falls below

0.5VAC when off.

Verify R and C terminals are supplied with 19-28VAC.

Verify Y terminal is connected to 24VAC at contactor coil. Verify voltage at contactor coil falls below

0.5VAC when off.

Check that compressor run and start wires are through module's current sensing holes. Verify Y

terminal is connected to 24VAC at contactor coil. Verify voltage at contactor coil falls below 0.5VAC

when off.

Check that compressor run and start wires are routed through the correct module sensing holes.

Determine if module's Y terminal is connected. Verify Y terminal is connected to 24VAC at contactor

coil. Verify 24 VAC is present across Y and C when the thermostat demand signal is present. If not,

R and C are reverse wired. Verify voltage at contactor coil falls below 0.5VAC when off. Review

Thermostat Demand Wiring for Y and C wiring.

Table 10. Mis-wired Module Troubleshooting

Recommended Troubleshooting Action

Issue 1827

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