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No.
Symptom
LED indication
Outdoor unit
7-time blink
operates.
2.5 seconds OFF
21
8-time blink
2.5 seconds OFF
22
9-time blink
2.5 seconds OFF
23
NOTE: 1. The location of LED is illustrated at the right figure. Refer to 12-6.1.
2. LED is lit during normal operation.
The blinking frequency shows the number of times the LED blinks after every 2.5-second OFF.
(Example) When the blinking frequency is "2".
ON
2.5-second OFF
OFF
OBH906A
Abnormal point/ Con-
dition
Low discharge tem-
Temperature of discharge temperature thermistor has been
perature protection
50°C or less for 20 minutes.
The overcurrent flows into PFC (Power factor correction:
PAM protection
PAM: Pulse Ampli-
IC820) or the bus-bar voltage reaches 394 V or more, PAM
tude Modulation
stops and restarts.
Inverter check mode The connector of compressor is disconnected, inverter check
mode starts.
0.5-second ON
2.5-second OFF
Condition
0.5-second ON
34
Remedy
• Refer to 12-5.
"Check of LEV".
• Check refrigerant circuit and refrig-
erant amount.
This is not malfunction. PAM pro-
tection will be activated in the fol-
lowing cases:
1 Instantaneous power voltage
drop. (Short time power failure)
2 When the power supply voltage
is high.
• Check if the connector of the com-
pressor is correctly connected.
Refer to 12-5.
"How to check
inverter/compressor".
Inverter P.C. board
Blinking →
LED
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