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Installation Instructions - Page 6
4. Refrigerant circuit
AU282FHERA
Ta
one-way valve
Tc
strainer PMV strainer
Te
accumulator
liquid pipe
strainer SV2
outdoor
4-way valve
gas pipe
strainer
oil segregator
OP
strainer oil return capillary
Ts
Td
compressor
LP gas-liquid segregator 图例
connected
disconnected
Tc2 PMV
Ta
indoor
Tc1
06
Installation Instructions - Page 7
AU48NFIERA AU60NFIERA
Ta 室外 HEX
one-way valve Te Tc
strainer PMV strainer accumulator
strainer SV2
liquid pipe
4-way valve
gas pipe
strainer SV1
strainer
oil segregator
strainer
OP
oil return capillary
Td
Ts
compressor
LP gas-liquid segregator
legend
outdoor
connected disconnected
PMV
Tc2
Ta
Tc1
indoor
07
Installation Instructions - Page 22
....3 4.15 12.7 4.22 13.0 4.27 13.4 4.36 14.0 4.49 14.6 4.57 15.5 4.70 16.5 4.83 16.9 4.92 17.5 4.96 18.1 5.04 18.7 5.09 19.3 5.13
AU48NFIERA heating mode
indoor temp.℃DB
18.0
20.0
21.0
TC PI TC PI TC PI
KW KW KW KW KW KW
11.1 3.49 11.1 3.68...
Installation Instructions - Page 43
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vhqd rodb
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~066 `mc B166 ~166 `mc B366
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`4 Wghdkcdc k`xdq ne bnlltmhb`shnm vhqd ltrs ad d`qsgdc `s nmd dmc4 a4 Xgd sns...
Installation Instructions - Page 63
... Changeable?
Shield layer should be grounded at single
point
Are communication wire and power cable set ? yes
no
Is indoor mainboard poorly welded? no wiring Separately
yes Eliminate interference
yes Replace indoor PCB
no
Reconnect
securely connected? Troubleshooting:
1.Communication failure
Is number of indoor and outdoor units
no
Check outdoor mainboard. yes
yes...
Installation Instructions - Page 64
...
no
Reconnect
yes
Are resistance and temperature characteristics of sensor properly connected?
no Check PCB and replace
4. yes
Check PCB and replace
no Replace sensor
3.EEPROM failure
no EEPROM chip installed firmly
Reinstall in right direction
yes
Is the PCB poorly w elded?
Over current protection
Check if the compressor current yes Check the system...
Installation Instructions - Page 65
...pipe of electromagnetic valve.
65 yes cleaning
no Replace TD sensor sensor in system? Is piping clogged with weld?
Is there air in good condition? Does outdoor fan work normally
...refrigerant is high, if SV2 by thermometer too high? Is there a leak? Check 1) Connector 2) Winding resistance 3) Valve 4) Mainboard
yes
no Is piping twisted or deformed? Evacuate and recharge
no Repair...
Installation Instructions - Page 66
... Open stop valves in suction pipe and liquid pipe of outdoor unit open? no
no Replace high pressure switch pressure gauge above 3MPa?
yes
Evacuate and recharge
66 yes
Is high ...fan motor or indoor EEV
yes
Is filter or heat exchanger dirty? yes
Are stop valve
yes Repair or replacement
if outdoor fan motor work properly during cooling cycle? and if indoor fan motor and indoor EEV...
Installation Instructions - Page 67
...work properly during cooling cycle? no Replace low pressure switch
yes
If outdoor stop valves of gas pipe no Repair fan motor and EEV
yes
If...Replace PCB
Is pressure valve detected by pressure gauge lower than 0.05MPa?
Do indoor fan and EEV work properly during heating cycle? yes
Is low side pressure switch activated?
no
and liquid pipe are dirty
yes
yes Cleaning
If refrigerant...
Installation Instructions - Page 68
... range of refrigerant; Communication with power module failure
Check if PCB is electrified with the power module
no
Replace power module
11. Suction temperature protection
Measure if the actual air return temperature is over 40degree
yes
no Check the suction temperature
Check the system: if the stop valve is correct
10.Failure code from...
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