Hitachi RWM-(H)FSN3E, Руководство по обслуживанию

Страница: 414 / 424

12 Troubleshooting
SMGB0070 rev. 1 - 08/2011
404

Activating condition of protection control code
For following the conditions as the temperature change, etc., the control of frequency, etc. is performed to prevent the
abnormal conditions by the protection control. The activating conditions of protection control are shown in the table below.
Code Protection control Activating condition Remarks
P0
Low-pressure ratio control at
cooling operation
Compression ratio ε < 2.2
=> frequency increase
ε = (Pd+0.1)/(Ps+0.1)
P1
High-pressure ratio control at
heating operation
Compression ratio ε > 7.5
=> frequency decrease
ε = (Pd+0.1)/(Ps+0.1)
P2 High-pressure increase protection
High pressure switch for control is activated
=> frequency decrease
P3
Over current protection
Inverter output current > (*1)A
=> frequency decrease
P4
DipIPM, ISPM or IPM temperature
increase protection
Inverter fin temperature
RAS-(4-10)HRNME-AF > 100 ºC
RAS-(3-6)HVRNME > 80 ºC
=> Frequency decrease
P5
Discharge gas temperature
increase protection
Temperature at the top of compressor is high
=> frequency decrease
Temperature at the top of compressor > 107ºC
=> indicate P5
P6 Frost formation protection
TL ≤ 2ºC Over 3 minutes
=> Frequency decrease
TL: liquid piping, temperature of
indoor unit
P9 Unbalance power source detecting Inverter output current > 13A (380A)
=> frequency decrease
PA Current demand control
Inverter output current > (*2)A
=> frequency decrease
In case of demand control setting
Pb Low-pressure decrease protection Low pressure switch for control is activated
=> frequency decrease
PC Cold draft protection TO ≤ 10ºC and ε ≥ 2.6 => frequency decrease
ε = (Pd+0.1)/(Ps+0.1)
TO: outlet temperature of indoor unit
P7 Inverter retry
Automatic stoppage of transistor module, acti-
vation of electronic thermal or abnormal current
sensor
When activating 3 times in 30 minu-
tes, “48”, “51”, “53” or “54” alarm is
indicated.
P8
Inverter retry
Insufficient/excessive voltage at inverter
Circuit or PCB connector part
When activating 3 times in 30 minu-
tes, “06” or “55” alarm is indicated.
N O T E S
• During protection control (except during alarm stoppage), the protection control code is indicated.
• The protection control code is indicated during protection control and turns off when canceling the protection
control.
• After retry control, the condition of monitoring is continued for 30 minutes.
• The maximum value (*1) and (*2) are as follows:
(*1)
HP
380 – 415V 220 – 240V
4 5 3 4 5
Current (A) 8.0 12.0 16.0 16.0 24.0
(*2)
HP
Demand
setting
380 – 415V 220 – 240V
4 5 3 4 5
Current
(A)
100% 4.0 5.5 11.5 13.0 17.0
75% 3.0 4.0 8.5 10.0 13.0
50% 2.0 2.0 5.5 6.5 8.5