3-34
SM-18006
TROUBLESHOOTING
(D) Cause Code of Inverter Stoppage
Code Cause Code Cause
1 Driver IC Error Signal Detection 12 Ground Fault Detection
2 Instantaneous Overcurrent 13 Open-Phase Detection
3 Inverter Temp. Increase 16 Inverter Malfunction
4 Electronic Thermal Protection (Inverter Overcurrent) 17 Abnormal Control
5 Inverter Voltage Decrease 18 Forced Stoppage by High Pressure Detection
6 Inverter Voltage Increase 19 Abnormality of Picking up Circuit for Protection
8 Abnormal Current Sensor 21 Abnormal Compressor Motor (Step-Out)
9 Instantaneous Power Failure Detection 22 Abnormal Combination of PCB
11 Micro Computer Reset 25 Abnormal Instruction Frequency
● Stoppage Condition of d1-07 (Operation Stoppage due to High/Low Entering Water Temperature)
Water source unit is prohibited to operate due to high/low entering water temperature as shown below.
NOTES:
1. If entering water temperature (Ta) is 118
o
F (48
o
C) or more/43
o
F (6
o
C) or less before starting compressor
operation, unit is forced to stop by d1-07 until entering water temperature is adjusted.
This restriction is released when entering water temperature (Ta) is 113
o
F (45
o
C) or less/50
o
F (10
o
C) or
more.
2. If low pressure (Ps) is increased excessively during heating operation (including simultaneous operation),
unit is forced to stop by d1-07 due to compressor protection.
This restriction is released when entering water temperature (Ta) is 77
o
F (25
o
C) or less,
or indoor inlet air temperature of indoor unit in heating operation is 73
o
F (23
o
C) or less.
If water source unit can not operate by this condition frequently, refrigerant charge amount is incorrect.
Reconrm additional refrigerant charge calculation and refrigerant charge work.
3. This chart is explanation for stoppage condition of d1-07.
For detail of operation temperature range, refer to Engineering Manual.
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