Haier MRV5-H - Page 92

89
Digital Tube
Indication
on Main Unit
Failure code denition 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 conrmed.
Once
conrmed
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
51-1 LEVa2 over current protection
52-0 LEVa1 disconnection fault
52-1 LEVa2 disconnection fault
74 Emergency Stop
External interface control(The machine will stop quickly after
switch cut o󰀨)
75-0
High and low pressure di󰀨erence is
too small
Pd - Ps = 51 psi for 3 minutes, if the outdoor protective stop.
Protect stop after 5 minutes, then restart.
Once
conrmed
un-resumable
76-0
Incorrect outdoor address or capacity
setting
The number of sub machine and host data does not match
the EERPOM set
Reset76-1
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