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2WAY SYSTEM
Control Functions-Outdoor Unit
1
11. Alarm Information
11. Alarm Information
2WAY SYSTEM
Control Functions-Outdoor Unit
8 hp
10 hp
12 hp
14 hp
16 hp
18 hp
20 hp
15.1
19.8
18.0
21.0
21.0
21.0
21.0
19.6
21.8
17.6
21.0
22.5
21.0
21.0
Primary current
Outdoor Unit
Description
Compressor 1 primary current detected over-current higher than values.
The fan motor current is included in primary current.
Compressor 1 secondary current detected over-current higher than values.
Occurs when missing phase or over-current is detected at inverter compressor start.
H01
Alarm
P29
P16
H31
Occurs when HIC detects abnormal temperature.
Secondary current
11-2-1. Inverter Compressor and Inverter Fan Motor
11-2-2. Constant-Speed Compressor
11-2-3. CT Circuit Detection Trouble
List of over-current
unit: Amp.
unit: Amp.
An alarm occurs when over-current or lock current is detected.
11-2. Current Protection
hp = horsepower
14 hp
16 hp
18 hp
20 hp
Overload current
Outdoor unit
Lock current
List of over-current and lock currents
Over current Lock current
Alarm display
Compressor 2
Compressor 3
H11
H21
H12
H22
Detected current
List of Alarms
hp = horsepower
Description
Alarm
Occurs when an open CT circuit is detected in the inverter compressor.
Occurs when a current value of over 18A is detected when the inverter
compressor is stopped.
Occurs when an open CT circuit is detected in the constant-speed compressor.
Occurs when a current value of 2.0A or less is detected when the constant-speed
compressor is operating.
Occurs when an open CT circuit is detected in the constant-speed compressor.
Occurs when a current value of 2.0A or less is detected when the constant-speed
compressor is operating.
Occurs when a primary current value of 0.7A or less is detected when the inverter
compressor is over 35Hz and the secondary current is over 7.0A.
Compressor 2
Compressor 1
Compressor 3
H13
H03
H23
12 hp
13.6
16.3
13.6
16.3
16.3
16.1
19.3
16.1
19.3
19.3
11. Alarm Information
2WAY SYSTEM
Control Functions-Outdoor Unit
11-3-1. High-Pressure Sensor Failure
The high-pressure switch works when it detects 3.65MPa or more.
If one of the high-pressure switches works, whole outdoor units stop and then restart.
If the high-pressure switch works after the system starts for 4 times, an alarm occurs.
11-3-2. Low-Pressure Sensor Failure
This system contains 2 types of pressure sensors: a high-pressure sensor and a low-pressure sensor.
11-3. Pressure Sensor Failure
11-4-1. Abnormal High Pressure
In the following conditions, an alarm occurs.
11-4-2. Abnormal Low-Pressure
11-4. High Pressure Protection and Low Pressure Protection
Alarm display
High-pressure sensor failure
F16
Alarm display
High-pressure cut-off
P04
Alarm display
Low-pressure cut-off
H06
Alarm display
Low-pressure sensor failure
F17
The compressor doesn't start when low-pressure detects 0.16MPa or less.
When the high-pressure sensor becomes an electrical open-circuit or a short-circuit conditions, and a broken
wiring, short-circuit or poor connection to the PCB in the high-pressure sensor circuit for 30 seconds or leaves the
valve close.
When the low-pressure sensor becomes an electrical open-circuit or a short-circuit conditions, and a broken wiring,
short-circuit or poor connection to the PCB in the low-pressure sensor circuit for 30 seconds.
When all outdoor units stop in cooling mode and low-pressure sensor detects 0.16MPa or lower, and this condition
continues for 60 minutes, alarm occurs.
When an outdoor unit stops in heating mode regardless of system operation and low-pressure sensor detects
0.16MPa or lower, and this condition continues for 60 minutes, an alarm occurs.
If the following condition occurs after the system starts for 5 times, alarm occurs.
The low-pressure sensor detects 0.06MPa or lower, and this condition continues for 2 minutes.
When the compressor 1 accumulated operation time is within 10 hours, the low-pressure sensor detects 0.05MPa
or lower, and this condition continues for 10 seconds.
The low-pressure sensor detects 0.02MPa or lower.
When the high-pressure sensor detected over 3.6MPa continuously for 30 minutes while outdoor units stopped.
When the high-pressure sensor detected over 3.6MPa while outdoor units were operating.
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2015/01/21 17:00:04
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