Frigidaire Q4SE Series User's Manual & Installation Instructions page 23

Two stage r-410a single package heat pump
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Status leD
Status leD Description
Yellow
"ALERT"
Short Cycling / Compressor is
Flash Code
running only briefly
3
Yellow
"ALERT"
Locked Rotor
Flash Code
4
Yellow
"ALERT"
Open Circuit
Flash Code
5
Yellow
"ALERT"
Open Start Circuit
Flash Code
Current only in run circuit
6
Yellow
"ALERT"
Open run circuit
Flash Code
Current only in start circuit
7
Yellow
"ALERT"
Welded Contactor
Flash Code
Compressor always runs
8
Yellow
Low Voltage
"ALERT"
Control circuit
Flash Code
< 17VAC
9
* Flash code number corresponds to a number of LED flashes, followed by a pause and then repeated. Trip and
alert LED's flashing at same time means control circuit voltage is too low for operation.
Status leD Troubleshooting information
• Thermostat demand signal is intermittent
• Low line voltage (contact utility if voltage at disconnect is low)
• Excessive liquid refrigerant in compressor
• Compressor bearings are seized
• Run capacitor has failed
• Low line voltage (contact utitlity if voltage at disconnect is low)
• Check wiring connections
• Excessive liquid refrigerant in compressor
• Compressor bearings are seized
• Measure compressor oil level
• Outdoor unit power disconnect is open
• Compressor circuit breaker or fuse(s) is open
• Compressor contactor has failed open
— Check compressor contactor wiring and connectors
— Check for compressor contactor failure (burned, pitted or open)
— Check wiring and connectors between supply and compressor
— Check for low pilot voltage at compressor contactor coil
— High pressure switch is open and requires manual reset
• Open circuit in compressor supply wiring or connections
• Unusually long compressor protector reset time due to extreme
ambient temperature
• Compressor windings are damaged
— Check compressor motor winding resistance
• Run capacitor has failed
• Open circuit in compressor start wiring or connections
— Check wiring and connectors between supply and the
compressor S terminal
• Compressor start winding is damaged
— Check compressor motor winding resistance
• Open circuit in compressor run wiring or connections
— Check wiring and connectors between supply and the
compressor R terminal
• Compressor run winding is damaged
— Check compressor motor winding resistance
• Compressor contactor has failed closed
• Thermostat demand signal not connected to module
• Control circuit transformer is overloaded
• Low line voltage (contact utility if voltage at disconnect is low)
• Check wiring connections
Table 8. leD Diagnostics - continued
23

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This manual is also suitable for:

Q4se-x24Q4se-x36Q4se-x48Q4se-x60

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