6 - 23
2WAY SYSTEM
Trouble Diagnosis
6
3. 2WAY Alarm Codes
2WAY VRF SYSTEM
Trouble Diagnosis
3. 2WAY Alarm Codes
P14 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check and
Correction
Example
Notes
P14
O
2 sensor operation
(1)
1-1 Is an O
2
sensor being used?
System configuration
If “Yes”, see “3-1”.
If “No”, see “2-1”.
If “Yes”, change the setting of item code 0B to “0000”
from “0001”.
If “No”, see “3-1”.
If “Yes”, see “3-3”.
If “No”, see “3-2”.
(2)
2-1 Is the EEPROM setting, item code 0B, on the indoor control board set to 0001?
Indoor EEPROM setting
(3)
3-1 Is the alarm triggered if the EXCT socket (wire) is disconnected, and the power is reset?
Indoor control board
3-2 Since there is no error, see what happens.
3-3 Indoor control board defective
replace board
—
—
(1)
(2)
It is judged an error whenever the outdoor unit receives the signal “O
2 Alarm Generated” from the
indoor unit.
With the indoor unit's EEPROM setting (item code 0B) set to 0001, the EXCT input was shorted.
—
P16, P26 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
Example
Notes
P16, P26
P16 : Compressor 1 overcurrent alarm
P26 : Compressor 2 overcurrent alarm
This alarm occurs when current trouble or current detection trouble occur
(when trouble judgement current is detected in the secondary current).
*
When more than the current values shown in the table are instantly
detected in the secondary current.
Changed to output error by current regardless of the inverter frequency.
(1) Power supply voltage malfunction
(2) Wiring failure (connection failure, miswiring)
* Wiring between HIC PCB and compressor
(1) Check the power supply voltage.
Check whether the voltage between each of the phases is correct while the compressor is running.
(It is necessary to check the compressor while running because the voltage may decrease when the
compressor starts running.)
(2) Check the wiring.
Check whether the following wiring is missing, connection failure or miswiring (position of U, V, W is
properly placed).
・ Wiring between HIC PCB and compressor
・ HIC PCB side
・ Compressor side
(1) Correct the power supply voltage.
(2) Correct the wiring.
(3) Replace the HIC PCB.
—
—
Capacity of unit
Secondary current
Current (A)
8HP
22.8
10HP
22.8
12HP
24.3
14HP
21.0
16HP
21.0
18HP
24.3
20HP
24.3
SM830237-02_北米向け2WAY_VRF.indb 23 2015/09/08 13:06:28
Inverter compressor
HIC PCB
Secondary
current
SM830253-00_欧州2way7_SM-TRSM.indb 23 16/08/02 14:02:51
To Next Page
Loading...
