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38 31-5000572 Rev. 1
ENGLISH
INSTALLATION INSTRUCTIONS
Failure Code
Digital tube
indication on
main unit
Failure code definition Failure description Remarks
43-0 Discharging temp sensor Tdi too low
protection
In normal operation, If Td < CT + 50 °F (10 °C) for continuous
5 minutes, the unit stops and alarms. 2 minutes and 50 s
later, resume automatically. If it occurs 3 times in an hour,
the failure is confirmed.
Once
confirmed
un-resumable
43-1 Discharging temp sensor Td1 too low
protection
45 Communication failure between outdoors
Continuous 30 s no communication
Resumable
46-0 Communication failure with INV1 module
board
46-1 Communication failure with INV2 module
board
46-4 Communication with fan 1 module board
46-5 Communication with fan 2 module board
47 Communication failure with wireless
module
Wireless module can not detect 2 minute alarm
51-0 LEVa1 over current protection
LEV drive chip detection
Resumable
51-1 LEVa2 over current protection
52-0 LEVa1 disconnection fault
52-1 LEVa2 disconnection fault
75-0 High and low pressure difference is too
small
Pd - Ps = 51 psi for 3 minutes, if the outdoor protective stop.
Protect stop after 5 minutes, then restart.
Once
confirmed
un-resumable
76-0 Incorrect outdoor address or capacity
setting
The number of sub machine and host data does not match
the EERPOM set
Reset
76-1 The address of sub machine and host data does not match
the EEPROM set
76-2 The capacity setting of sub machine and host data does not
match the EEPROM set
83 Incorrect parameter setting or incorrect
match of outdoor unit
Outdoor machine type dial code settings error or with the
host model does not match
Non
recoverable
99-x Program self default X=0~5 Resumable
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