Hitachi HRNM Serie Installations- Und Betriebshandbuch Seite 49

18. SAFETY SUMMARY & CONTROL DEVICE SETTING
Compressor Protection
High Pressure Switch:
This switch cuts out the operation of the compressor
when the discharge pressure exceeds the setting.
For Compressor
Pressure Switches
High
Fuse
3~ 400V 50Hz
CCP Timer
Setting Time
For Condenser Fan Motor
Internal Thermostat
DC
AC
For Control Circuit
Fuse Capacity on PCB 1,5
19. TROUBLESHOOTING
Alarm Code Indication of Remote Control Switch:
Abnormal Abnormal Ref.
Indoor Unit No. Cycle No.
COOL MED
ADDS. RN
A/C ALARM
Code
Category
No.
01 Indoor Unit Activating of Protection Device
02 Outdoor Unit Activating of Protection Device
Abnormality between Indoor (or Outdoor) and
03
Outdoor (or Indoor)
Transmission
04 Abnormality between Inverter and Control PCB
Voltage Drop by Excessively Low or High
06 Voltage Drop
Voltage to Outdoor Unit
07 Decrease in Discharge Gas Superheat
Cycle
08 Increase in Discharge Gas Temperature
Model
Cut-Out MPa
Cut-In MPa
A
min.
o
Cut-Out C
o
Cut-Out C
o
Cut-In C
A
Fuse Capacity on PCB 3
Alarm Code Model Code
COOL MED
A/C
Indicated for
a second
alternately
Content of Abnormality
SAFETY SUMMARY & CONTROL DEVICE SETTING
Fan Motor Protection
When the thermistor temperature is reached to the
setting, motor output is decreased.
The other way, when the temperature becomes lower,
limitation is cancelled.
RAS-8 RAS-10
Automatic Reset, Non-Adjustable
-0.05 -0.05
4.15 4.15
-0.15 -0.15
3.20 0.15 3.20 0.15
40 40
Non-Adjustable
3 3
Automatic Reset, Non-Adjustable
(each one for each motor)
120 5 120 5
150 5 150 5
96 5 96 5
5 5
10 10
Connected No.
Alarm Code
of Indoor Units
ADDS. RN
ALARM
Failure of Fan Motor, Drain Discharge, PCB, Relay, Float Switch
Activated
Activation of PSH, Locked Motor, Abnormality of power supply
phase
Incorrect Wiring, Failure of PCB, Tripping of Fuse, Power
Supply OFF
Failure in Transmission between PCBs for Inverter
Voltage Drop of Power Supply. Incorrect Wiring or insufficient
Capacity of Power Supply Wiring
Excessive Refrigerant Charge, Expansion Valve Open Lock
Insufficient Refrigerant, Ref. Leakage, Clogging or Expansion
Valve Close Lock
RAS-12
-0.05
4.15
-0.15
3.20 0.15
40
3
120 5
150 5
96 5
5
10
Model Code
Indication Model
Heat-Pump
Inverter
Multi
Cooling Only
Others
Leading Cause
37