Protection Control Code On 7-Segment Display - Hitachi RAS-(3-6)HVNC1(E) Service Manual

8 Troubleshooting
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Protection control code on 7-segment display
1 Protection control code is displayed on 7-segment when a protection control is activated.
2 Protection control code is displayed while function is working, and goes out when released.
3 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. Priority order:
Š High-pressure increase protection
Š Over current protection
Š Cold draft protection
b. In relation to retry control, the latest retrial will be indicated unless a protection control related to frequency control
is indicated.
RAS-(2-2.5)HVNP1 / RAS-3HVNC1
Priority
1 Low-Pressure Ratio Control at Cooling Operation
2 High-pressure ratio control at heating operation
3 High-pressure rise protection
4 Current protection
5 Inverter fin temperature rise prevention
6 Discharge gas temperature rise protection
7 Unbalance Power Source Detecting
8 Demand current control
9 Low-Pressure Decrease Protection
RAS-(3-12)H(V)N(P/C)(1)(E)
Priority
1 Pressure ratio control
2 High-pressure rise protection
3 Current protection
4 Inverter fin temperature rise prevention
5 Discharge gas temperature rise protection
6 Demand current control (running current limit control)
7 High pressure decrease protection (only Premium series)
N O T E
The protection control code being indicated on 7-segment display is changed to an alarm code when the abnormal opera-
tion occurs. Also, the same alarm code is indicated on the remote control switch.
298
SMGB0087 rev.0 - 12/2013
Protection control
Protection control
Code
p00
p01
p02
p03
P04
p05
p09
p0A
p0b
Code
p01
p02
p03
P04
p05
p0A
p09