Service Manual
1-89
INSTALLATION
Table 9.2 Alarm Code
Code
Category
Content of Abnormality
Leading Cause
01
Indoor Unit
Activation of Protection Device (Float Switch)
Activation of Float Switch (High Water Level in
Condensation Drainage Pan, Problem with Drain Piping,
Float Switch, or Condensation Drainage Pan)
02
Outdoor Unit
Activation of Protection Device
(High Pressure Cut)
Activation of PSH (Pipe Clogging, Excessive
Refrigerant, Inert Gas Mixing)
03
Communication
Operational Irregularities between
Indoor and Outdoor
Incorrect Wiring, Loose Terminals, Disconnect Wire,
Blowout of Fuse, Outdoor Unit Power OFF
04
04.
Problem between Inverter PCB and
Outdoor PCB
Problem between Fan Controller and
Outdoor PCB
Inverter PCB - Outdoor PCB Communication Failure
(Loose Connector, Wire Breaking, Blown of Fuse)
Fan Controller - Outdoor PCB Communication Failure
(Loose Connector, Wire Breaking, Blown of Fuse)
05
Supply Phase Problem of Power Source Phases
Incorrect Power Source, Connection to
Reversed Phase, Open-Phase
06
Voltage
Abnormal Inverter Voltage
Outdoor Voltage Drop, Insufficient Power Capacity
06.
Abnormal Fan Controller Voltage
Outdoor Voltage Drop, Insufficient Power Capacity
07
Cycle
Decrease in Superheated Discharge Gas
Excessive Refrigerant Charge, Failure of Thermistor,
Incorrect Wiring, Incorrect Piping Connection,
Expansion Valve Locking at Opened Position
(Disconnect Connector)
08
Increase in Discharge Gas Temperature
Insufficient Refrigerant Charge, Pipe Clogging,
Failure of Thermistor, Incorrect Wiring,
Incorrect Piping Connection, Expansion Valve
Locking at Closed Position (Disconnect Connector)
0A
Communication Problem between Outdoor and Outdoor
Incorrect Wiring, Breaking Wire, Loose Terminals
0b
Outdoor Unit
Incorrect Outdoor Unit Address Setting
Duplication of Address Setting for Outdoor Units
(Sub Units) in Same Refrigerant Cycle System
0C
Incorrect Outdoor Unit Main Unit Setting
Two (or more) Outdoor Units Set as “Main Unit”
Exist in Same Refrigerant Cycle System
11
Sensor on
Indoor Unit
Inlet Air Thermistor
Incorrect Wiring, Disconnecting Wiring
Breaking Wire, Short Circuit
Incorrect Wiring, Severed or Disconnecting Wiring,
Short Circuit
12
Outlet Air Thermistor
13
Freeze Protection Thermistor
14
Gas Piping Thermistor
Outdoor Air Thermistor (ECONO)
Remote Sensor (DOAS)
Thermistor Built-in Remote Controller (DOAS)
19
Fan Motor
Activation of Protection Device for Indoor Fan
Fan Motor Overheat, Lockup
21
Sensor on
Outdoor Unit
High Pressure Sensor
22
Outdoor Air Thermistor
23
Discharge Gas Thermistor on Top of Compressor
24
Heat Exchanger Liquid Pipe Thermistor
25
Heat Exchanger Gas Pipe Thermistor
29
Low Pressure Sensor
15
16
17
Summary of Contents for YVAHP072B31S
Page 2: ......
Page 10: ...viii Service Manual ...
Page 16: ......
Page 17: ...Service Manual 1 1 INSTALLATION 1 Installation ...
Page 577: ...Service Manual 1 561 INSTALLATION 9 Touch Back to return to the Service Menu screen 9 ...
Page 920: ......
Page 921: ...Service Manual 2 1 OPERATION 2 Operation ...
Page 1315: ...Service Manual 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Page 1461: ...Service Manual 4 1 MAINTENANCE 4 Maintenance ...
Page 1728: ......
Page 1729: ...Service Manual 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Page 1738: ...6 10 Service Manual FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A ft 3 l b ...
Page 1739: ...SERVICE PARTS LIST Service Manual 7 1 7 Service Parts List ...
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Page 1796: ... 2015 Johnson Controls Inc SM 15001 ...