Service Manual
171
Troubleshooting Guide
Communication
error (indoor ›
Main PCB )
Error
Code
Error Contents
Meaning
Main Causes
Error display
position
53
The indoor cannot receive
signal from the Main PCB
Concerned
Remote
Controller
Outdoor unit
1. The communication cable is not
connected
2. Communication cable is cut or short
3. Defective outdoor Main / indoor
PCB
■
Defect inspection method
1) Check the indoor unit's control box's power supply and communication connecting condition (terminal block )
2) Check if the communication cable is short or open and remove the cause if any
(Open confirmation :
After the power OFF short the two cables with each other and measure the resistance with a tester ’ If above 5
Ω
then it is Open)
(Short confirmation :After power OFF separate the cables and measure the resistance with a tester › If below
5
Ω
then it is short )
3) In case there is no error in above given cases 1~2 the separate all the communication cables and recheck after
connecting the indoor units individually
(The error code is displayed when the defective PCB is connected to the indoor unit) › Replace the concerned
indoor unit's PCB .
4) In case one indoor or a few indoor has 'CH53' error display :
Re operate the Auto-Addressing and check whether the all indoor units have Auto-Addressing setting .
(After the power ON, make sure to operate the Auto-Addressing after one minute )
› In case the any PCB has not got the Auto-Addressing then recheck the communication cable and replace the
indoor PCB if required .
5) Make sure to separate the power line (AC220/380V) and the communication line by at least 30 cm
CAUTION
• In case you replace the communication cable with the power cable by mistake then al indoor units PCB can be
damaged
Outdoor 3 phase
power supply
wrong wiring
(Phase omission )
Error
Code
Error Contents
Meaning
Main Causes
Error display
position
54
Wrong wiring at the out-
door 3 phase
(Phase omission )
Concerned
Remote
Controller
Outdoor unit
1. Defective inverter PCB
2. R, S, T power not connected
3. Main Fuse damaged
■
Defect inspection method
1) Check the outdoor Main fuse .
2) If the error code exists even after replacing the outdoor PCB then request the building's electric in charge to
recheck the power supplied.
Содержание ARNU Series
Страница 13: ...Service Manual 13 External Appearance 2 2 Outdoor Units ARUN1008F20 10HP ...
Страница 16: ...16 ...
Страница 17: ...Service Manual 17 Indoor Units ...
Страница 18: ...18 Indoor Unit ...
Страница 30: ...30 Indoor Unit ...
Страница 44: ...44 Indoor Unit ...
Страница 79: ...Service Manual 79 Outdoor unit ...
Страница 88: ...88 Outdoor Unit 5 Wiring Diagrams Wiring Diagrams ...
Страница 112: ...112 Outdoor Unit ...
Страница 113: ...Service Manual 113 Trouble shooting guide ...
Страница 137: ...Service Manual 137 Troubleshooting Guide Resistance measure between phases of compressor ...
Страница 140: ...Troubleshooting Guide 140 Outdoor Unit Check 3 phase rectification diode Measure input power between phases R S R T S T ...
Страница 141: ...Service Manual 141 Troubleshooting Guide Measure input power of one phase R S T Connector of compressor ...
Страница 142: ...Troubleshooting Guide 142 Outdoor Unit Connector of reactor Connectors of 3phase diode ...
Страница 143: ...Service Manual 143 Troubleshooting Guide Connectors of capacitor Check IPM PCB ...
Страница 144: ...Troubleshooting Guide 144 Outdoor Unit Measure current of IPM U V W Measure voltage of IPM P N ...
Страница 149: ...Service Manual 149 Troubleshooting Guide SVC valve Measure resistance on the pressure switch connector ...
Страница 150: ...Troubleshooting Guide 150 Outdoor Unit Pressure switch CHECK VALVE ...
Страница 152: ...Troubleshooting Guide 152 Outdoor Unit Measure power input of outdoor unit ...
Страница 153: ...Service Manual 153 Troubleshooting Guide Measure power input of outdoor unit ...
Страница 156: ...Troubleshooting Guide 156 Outdoor Unit Liquid injection by pass valve ...
Страница 157: ...Service Manual 157 Troubleshooting Guide Measure resistance of LEV coil ...
Страница 158: ...Troubleshooting Guide 158 Outdoor Unit Heater ...
Страница 164: ...Troubleshooting Guide 164 Outdoor Unit Pressure sensor connector High pressure sensor Low pressure sensor ...
Страница 168: ...Troubleshooting Guide 168 Outdoor Unit Measure input power of outdoor unit ...
Страница 172: ...Troubleshooting Guide 172 Outdoor Unit Check main fuse of out door unit ...
Страница 176: ...Troubleshooting Guide 176 Outdoor Unit Fan IPM ...
Страница 178: ...Troubleshooting Guide 178 Outdoor Unit Measure input power of fan main PCB ...
Страница 182: ...Troubleshooting Guide 182 Outdoor Unit 4way valve in the outdoor unit 4way valve connector on the Main PCB ...
Страница 183: ...Service Manual 183 Exploded View Replacement Parts List ...