133
Error Codes
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Table 75: Error Codes, continued.
ERROR CODE TABLES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error Code Description Details
Outdoor Unit
1131
Master outdoor unit liquid pipe temperature sensor
error.
• Check the connection on the outdoor unit PCB.
• Thermistor shorted or opened.
• Check for 12 V DC between 12 V and GND (red to black) for
5 V DC.
• Check the Signal to GND (white to black) and use correct chart
from Troubleshooting section to compare with actual system
temperature.
1132
Slave1 outdoor unit liquid pipe temperature sensor
error.
1133
Slave2 outdoor unit liquid pipe temperature sensor
error.
1141
Master outdoor unit subcooling inlet temperature
sensor error.
1142
Slave1 outdoor unit subcooling inlet temperature
sensor error.
1142
Slave2 outdoor unit subcooling inlet temperature
sensor error.
1151
Master outdoor unit subcooling outlet temperature
sensor error.
1152
Slave1 outdoor unit subcooling outlet temperature
sensor error.
1153
Slave2 outdoor unit subcooling outlet temperature
sensor error.
1161
Master outdoor unit low oil level or oil level sensor
error.
• Master outdoor unit may have low oil levels.
• Master outdoor unit oil level sensor disconnected or shorted.
1 1 6 2 Slave1 outdoor unit oil level sensor error.
• Slave1 outdoor unit may have low oil levels.
• Slave1 outdoor unit oil level sensor disconnected or shorted.
1 1 6 3 Slave2 outdoor unit oil level sensor error.
• Slave2 outdoor unit may have low oil levels.
• Slave2 outdoor unit oil level sensor disconnected or shorted.
1451
Communication error between master outdoor unit
main board and external board.
Master outdoor unit main board to external board communica-
tion failure.
1452
Communication error between slave1 outdoor unit
main board and external board.
Slave1 outdoor unit main board to external board communica-
tion failure.
1453
Communication error between slave2 outdoor unit
main board and external board.
Slave2 outdoor unit main board to external board communica-
tion failure.
1501
Master outdoor unit compressor discharge superheat
not satisfied.
Code indicates that based on current superheat measurements,
there is a high possibility of liquid refrigerant flooding back and
damaging the compressor.
• Outdoor unit compressor discharge superheat not satisfied for
PLQXWHV
• Code can only occur when the outdoor is operating in cooling
mode (all indoor units must be in cooling mode; error cannot
occur during simultaneous operation).
• After at least 10 minutes of compressor operation, the master
outdoor unit microprocessor will calculate the system’s com-
pressor superheat. If at any time during compressor operation
where all indoor units in thermal on are in cooling mode and
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there is a high probability that liquid could flood back to the in-
let of the compressor scroll, resulting in compressor damage.
• If error occurs 3 times within any 1 hour period of compressor
operation, the system will shut down and remain off. A manual
restart will be necessary.
1502
Slave1 outdoor unit compressor discharge superheat
not satisfied.
1503
Slave2 outdoor unit compressor discharge superheat
not satisfied.
1511
Master outdoor unit difference between high and low
pressure is too low.
Not enough pressure difference between high and low. Function
error of outdoor unit four-way reversing valve (defective, discon-
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1512
Slave1 outdoor unit difference between high and low
pressure is too low.
1513
Slave2 outdoor unit difference between high and low
pressure is too low.
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