SM-18006
3-33
TROUBLESHOOTING
Code Category Content of Abnormality Leading Cause
A1
External Input
Detection of External Abnormality Input Signal by External Abnormality Detection Setting
A2 Flow Switch Abnormality
Insufcient Water Flow Rate, Flow Switch Failure,
Incorrect Wiring of Flow Switch
b0
Indoor Unit
Incorrect Setting of Unit Model
Code
Incorrect Setting of Indoor Unit Model
b1
Incorrect Setting of Unit and
Refrigerant Cycle Number
64 or More Number is Set for Address or Refrigerant
Cycle
b2 Abnormality of EEPROM EEPROM failure, Incorrect Data of EEPROM
b5 Incorrect Indoor Unit No. Setting
There are 17 or More Non-Corresponding to H-LINK II
Units are Connected to One System.
b6
Abnormal Communication between
Indoor PCB and Indoor Fan
Controller
Communication Failure, Disconnected Communication
Cable, Abnormal Connection
C1
Change-Over
Box
Incorrect Change-Over Box
Connection
2 or More Change-Over Boxes are Connected between
Water Source Unit and Indoor Unit
C2
Incorrect Indoor Unit Connection
Number
9 or More Indoor Units Connected to Single Branch Type
Change-Over Box,
7 or More Indoor Units Connected per a branch of
Multiple Branch Type Change-Over Box
C3
Incorrect Indoor Unit Refrigerant
Number Setting
Indoor Units of Different Refrigerant Cycle Number are
Connected to Change-Over Box
C5 Incorrect Connection Port Setting
Indoor Unit is connected to a port that is set to not used
for Multiple Branch Type Change-Over Box
E4
Water Source
Unit
Cooling Fan Abnormality
Cooling Fan Failure, Blowout of Fuse for Cooling Fan,
Abnormally High Ambient Temperature
EE Compressor
Compressor Protection Alarm
(It can not be reset from Wired
Controller)
This alarm code appears when the following alarms*
occurs three times within 6 hours.
*02, 07, 08, 39, 43 to 45, 47
(C) Cause Code of Indoor Unit Stoppage
* Thermo-ON: The water source unit and some indoor units are running.
* Thermo-OFF: The water source unit and some indoor units stay on, but don’t run.
Code Cause Code Cause
0 Operation OFF, Power OFF 16 Retry due to Decrease of Discharge Gas Superheat
1 Thermo-OFF 17 Retry due to Inverter Tripping
2 Alarm
18
Retry due to Voltage Decrease/Increase,
Other Retry of Inverter
3 Freeze Protection, Overheating Protection
5 Instantaneous Power Failure at W.S. 19 Expansion Valve Opening Difference Protection
6 Instantaneous Power Failure at Indoor Unit 21 Forced Thermo-OFF for Oil Return
7
Stoppage of Operation due to High/Low Entering
Water Temp. (Refer to the next page for details.)
22
Enforced Thermo-OFF for Hot Start Control
at Crankcase Heater Preheating
9 Stoppage of Reversing Valve Switching Control 26 Retry due to High Pressure Decrease
10 Demand Enforced Stoppage 28 Stoppage due to Outlet Temp. Decrease in Cooling
11 Retry due to Pressure Ratio Decrease 30
Stoppage of Thermo-OFF due to Compressor
Excepting
12 Retry due to Low Pressure Increase 31
Retry due to Entering Water Temp. Increase/
Decrease
13 Retry due to High Pressure Increase 32 Retry due to Abnormal Communication of W.S.
15
Retry due to Discharge Gas Temperature Increase,
Retry due to Low Pressure Decrease
34 Stoppage of Thermo-OFF by Motion Sensor
39
Stoppage of Thermo-OFF due to Power Saving
Control
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