Haier YR-H 71 Service Manual page 39

43 Master discharge temp. sensor alarm in
low frequence
44 Communication error between master
unit MB89F538 and MCU 807(indoor)
Communication error between master
45
unit MB89F538 and MCU 807 (indoor)
MB89F538 and 807 central controller
Communication error between master
46
unit connecting board and inverter PCB
49 Master inverter drive PCB EEPROM
error
50 The total capacity of indoor units is too
high
51 Outdoor communication signal is lost
52 Indoor units is over than 64 sets
53 Central control address repeat
54 Master unit oil temp. is over-low
69 Slave unit is lost
70 Shortage of refrigeration
When inverter compressor frequence is lower than 30Hz,
TD1 is higher than 110
No signal for over 4 minutes
No signal from indoor unit or central controller for over 4
seconds
No signal for over 2 minutes
EEPROM data is lost or installed in wrong way.
Total capacity of indoor units>outdoor capacity x 135%
Check the address of all indoor units
In running, the temp. of compressor oil is lower than
(ps+10 for 5 minutes
Communication of slave unit error or switched off
Only show diagnostic code, doesn t stop units
39