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TROUBLESHOOTING
Protection Control Code on 7-Segment Display
(a) The protection control indication can be seen on 7-segments when a protection control is
activated.
(b) The 7-segment continues ON while function is working, and goes out when released.
(c) When several protection controls are activated, code number with higher priority will be indicated
(see below for the priority order).
• Higher priority is given to protection control related to frequency control than the other.
<Priority Order>
* Pressure Ratio Control
* High-Pressure Rise Protection
* Current Protection
* Discharge Gas Temperature Rise Protection
* Low-Pressure Fall Protection
* Reversing Valve Switching Control (For 16, 20HP and FX Series)
* High-Pressure Decrease Protection
* Oil Return Control
• In relation to retry control, the latest retrial will be indicated unless a protection control related to
frequency control is indicated.
• Retry indication continues for 30 minutes unless a protection control is indicated.
• Retry indication disappears if the stop signal comes from all indoor units.
NOTE:
The protection control code being indicated on 7-segment display is changed to an alarm code when the
abnormal operation occurs. Also, the same alarm code is indicated on the remote control switch.
Protection Control
Pressure Ratio Control (*)
Code
Protection Control
Pressure Ratio Decrease
Retry
Code
Running Current Limit Control
(For 24, 30HP)
High-Pressure Increase
Protection (*)
Low-Pressure Increase
Retry
Current Protection (*)
High-Pressure Increase
Retry
Discharge Gas Temperature
Increase Protection (*)
Inverter Fin Temperature
Increase Protection
(For 24, 30HP)
Over Current Retry of
Constant Compressor
Low-Pressure Decrease
Protection
Vacuum/Discharge Gas
Temperature Increase Retry
4-Way Valve Switching Control
(For 16, 20HP)
Discharge Gas SUPERHEAT
Decrease Retry
Oil Return Control Inverter Trip Retry
High-Pressure Decrease
Protection
In the case that degeneration control is
activated,
c
is indicated in stead of
0
. (*mark)
Insufficient Voltage/
Excessive Voltage Retry
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