Alarm
Code
Abnormal Inverter Voltage
●
“RUN” light is flashing and “ALARM” are indicated on the remote control switch.
●
The unit No., alarm code and the unit code are alternately indicated on the set temperature section, and
the alarm code is indicated on the display of the outdoor unit PCB1.
★
This alarm is indicated when voltage between terminal
“P” and “N” of transistor module (IPM) is insufficient and
its occurrence is three times in 30 minutes. In the case that
the occurrence is
fewer
than 2 times, retry is performed.
*
*
PCB1: Control PCB in Outdoor Unit
PCB2: Inverter PCB
Does the voltage
fall during operation
by operation of
other apparatus?
Is connection correctly
between PCB2,
capacitors A*,
DCL and CMC?
Does LED201 on PCB2
ON after compressor's
electromagnetic switches
(CMC) turn ON?
Check capacitors A*.
Restart operation.
Check wiring and
wire sizes.
Connect correctly.
Replace capacitors.
Capacitors have high voltage.
Be careful especially. *1)
Yes
Yes
Yes
Check the wiring, the transistor
module and capacitors A*. *2)
In case the wiring is correct,
replace the transistor module.
Yes
Yes
Normal
Normal
Fault
Abnormal
(Loose Wiring,
Change of
Color)
Frequency can
increase higher
than 60Hz.
Compressor stops
immediately.
(lower than 30Hz)
Compressor stops
when frequency
increase. (Approx.
31Hz to 60Hz)
How is
compressor
operation?
Is the DC voltage
over B* V?
* Be careful especially because of high voltage.
Yes
No
No
No
No
No
No
Check CMC for Compressor.
Faulty transistor module.
Replace it.
Faulty CMC.
Replace it.
Faulty PCB2.
Replace it.
In case of 380-415V/50Hz, 380V/60Hz:
Is the power supply voltage 380V+10% or
415V+10% ?
In case of 220V/60Hz:
Is the power supply voltage 220V+10%?
In case of 380-415V/50Hz, 380V/60Hz:
Is the power supply voltage more than 323V?
In case of 220V/60Hz:
Is the power supply voltage more than 187V?
Check Item
460
380-415V/50Hz
380V/60Hz
Power Supply
230
CB1, CB2
CB
220V/60Hz
B*
Voltage (DC)
A*
Capacitor
<Outdoor Unit PCB1 Display Indication>
Abnormal of Inverter
Direct Current
Measuring Position
Ȁ
Measuring Range: DC1000V
1): If capacitor has high voltage, perform th e high voltage discharge work according to the item 13.
4
.
2): Checking p
rocedures of transistor module is indicated in the item 13.4.
198
