Check code
5300
(UH)
Primary current error
Abnormal points and detection methods
Causes and checkpoints
Abnormal if any of the following conditions is detected:
1 Primary current sensor detects any of the following conditions (single
phase unit only):
2 Secondary current sensor detects 25 A or more.
3 Secondary current sensor detects 1.0 A or less.
Decrease/trouble of power supply voltage
Disconnection of compressor wiring
Current sensor trouble on outdoor power circuit
board
Wiring through current sensor (penetration type) is
not done.
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting
any connectors, or replacing boards.
Diagnosis
Remedy
10 consecutive-
second detection One-time detection
34 A
38 A
(Three-phase)
Yes
Yes
No
No
Yes
No
Is the power supply single phase?
Is there any
abnormality such as a
disconnection, looseness,
or breakage?
The power supply voltage might be
decreased or abnormal.
Check the power supply facility.
Connect the compressor wiring properly.
Replace the outdoor power circuit board
(Malfunction of current sensor circuit).
Check the power specification of the
outdoor unit.
Check the value on the secondary current
sensor during the error.
(Single-phase)
Does it satisfy the condition 1?
No
SW1 Setting
ON
OFF
Display on LED1, 2
Unit
0–999.9
Arms
4
1 2
5 6 7 8
3
The secondary current sensor value during the error can be displayed
by an operation of SW1 on the outdoor multi controller circuit board.
Does it satisfy the
condition 2 or 3?
Check the compressor
wiring.
81
OCH668B
