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Protection Control Code on 7-Segment Display
* Protection control code is displayed on 7-segment during operation when a protection control is
activated.
* Protection control code is displayed while function is working, and goes out when released.
* When several protection control are activated, code number with higher priority will be indicated
(see below for the priority order).
(a) Higher priority is given to protection control related to frequency control than the other.
NOTE:
(1) Retry indication continues for 30 minutes unless a protection control is indicated.
(2) Retry indication disappears if the stop signal comes from all rooms.
(3) 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.
(4) In case that the degeneration control is activated, the indications Pc1 to Pc5 are indicated instead
of P01 to P05.
Code
Protection Control
Code during
Degeneration
Control
Pressure Ratio Protection Control
High-Pressure Increase Protection
Inverter Current Protection
Inverter Fin Temperature Increase Protection
Discharge Gas Temperature on Top of Compressor Increase Protection
Low-Pressure Decrease Protection
Without
High-Pressure Decrease Protection
Demand Current Protection Control
Low-Pressure Increase Protection
< Priority Order >
<6> Low-Pressure Decrease Protection
<7> Demand Current Control
(Running Current Limit Control)
<1> Pressure Ratio Control
<2> High-Pressure Increase Protection
<3> Current Protection
<4> Inverter Fin Temperature Increase Protection
<8> Low-Pressure Increase Protection
<5> Discharge Gas Temperature Increase Protection
<9> High-Pressure Decrease Protection
(b) In relation to retry control, the latest retry code will be indicated unless a protection control related to
frequency control is indicated.
Code
Retry Control
Code during
Degeneration
Control
Pressure Ratio Decrease Retry
Without
Low-Pressure Increase Retry
High-Pressure Increase Retry
Overcurrent Retry of Constant Speed Compressor
Discharge Gas Temperature Increase Retry/Low-Pressure Decrease Retry
Discharge Gas SUPERHEAT Decrease Retry
Inverter Abnormality Retry
Abnormal Inverter Voltage Retry/Inverter Failure Retry
High-Pressure Decrease Retry
250
