Miswired Module Troubleshooting

 

 

 

 

 

Miswired Module Indication

Recommended Troubleshooting Action

 

 

 

 

 

 

Green LED is not on,

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 on page 16 for

 

 

module does not power up.

 

 

R and C wiring.

 

 

 

 

 

 

 

 

 

Green LED intermittent,

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

 

 

module powers up only

terminals have a constant source. Review 24VAC Power Wiring section on page 16

 

 

when compressor runs.

for R and C wiring.

 

 

 

 

 

 

TRIP LED is on but system

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

 

 

and compressor check OK.

coils falls below 0.5VAC when off.

 

 

 

 

 

 

TRIP LED and ALERT LED

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

 

 

flashing together.

 

 

 

 

 

 

 

 

 

ALERT Flash Code 3

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

 

 

(Compressor Short Cycling)

 

 

coil falls below 0.5VAC when off.

 

 

displayed incorrectly.

 

 

 

 

 

 

 

 

 

ALERT Flash Code 5, 6, or 7

Check that compressor run and start wires are through module's current sensing

 

 

(Open Circuit, Open Start

 

 

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

 

 

Circuit, or Open Run Circuit)

 

 

contactor coil falls below 0.5VAC when off.

 

 

displayed incorrectly.

 

 

 

 

 

 

 

 

 

ALERT Flash Code 6

 

 

 

(Open Start Circuit)

Check that compressor run and start wires are routed through correct module

 

 

displayed for Code 7

 

 

sensing holes.

 

 

(Open Run Circuit

 

 

 

 

 

or vice versa.

 

 

 

 

 

 

 

ALERT Flash Code 8

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

 

 

contactor coil. Verify 24VAC is present across Y and C when thermostat demand signal is

 

 

(Welded Contactor)

 

 

present. If not, R and C are reverse wired. Verify voltage at contactor coil falls below

 

 

displayed incorrectly.

 

 

0.5VAC when off. Review Thermostat Demand Wiring on page 16 for Y and C wiring.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 11

506467-01

Issue 1008

Page 19

Page 19
Image 19
Allied Air Enterprises 4AC16LT manual Miswired Module Troubleshooting, Sensing holes

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