Hitachi RAS-3HVRNME-AF - SAFETY SUMMARY & CONTROL DEVICE SETTING; Compressor Protection Settings; Fan Motor Control Settings; TROUBLESHOOTING

37
PMML0205A rev.4 - 11/2012
ENGLISH
SAFETY SUMMARY
& CONTROL DEVICE
SETTING
14. 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.

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.
Model RAS-3H(V)RNME-AF RAS-4H(V)RNME-AF RAS-5H(V)RNME-AF RAS-6H(V)RNME-AF
For Compressor
Automatic Reset, Non-Adjustable (each one for each compressor)
Pressure Switches
-0.05 -0.05 -0.05 -0.05
High Cut-Out MPa 4.15 4.15 4.15 4.15
-0.15 -0.15 -0.15 -0.15
Cut-In MPa 3.20±0.15 3.20±0.15 3.20±0.15 3.20±0.15
For Control
A
A
40
-
40
2X20
50
2X20
50
2X20
Fuse
1φ, 230V, 50Hz
3φ, 400V, 50Hz
CCP Timer
min.
Non-Adjustable
Setting Time 3 3 3 3
For Condenser Fan Motor
Automatic Reset, Non-Adjustable (each one for each motor)
Internal Thermostat
Cut-Out
o
C - - - -
For Control Circuit
A 5 5 5 5
Fuse Capacity on PCB
15. TROUBLESHOOTING
Alarm Code Indication of Remote Control Switch:
Alarm indication
Alarm code
NOTE:
− For information about troubleshooting by 7-segment, please refer
to the Service Manual.
Alarm
Code
Retry Stop
Code
Origin Detail of Abnormality Main Factors
02 - Outdoor
Activation of Outdoor Unit Protection Device
(Except for Alarm Code 41, 42)
High pressure interrupting device activated
03 - Outdoor Transmission Error
Outdoor fuse meltdown, Indoor/outdoor connection wiring
(breaking, wiring error, etc.)
04 - Outdoor Inverter Transmission Abnormality
Control PCB – Inverter PCB connection wiring (breaking,
wiring error, etc.)
05 - Outdoor Power Phase Detection Abnormality Power source wiring open phase in Indoor Units
06 P8 Outdoor Undervoltage, Overvoltage
Outdoor PCB abnormality, inverter PCB abnormality, DM,
CB abnormality
07 16 Outdoor
Abnormal decrease of discharge gas superheat
degree
Excessive refrigerant, expansion valve open-locked, Fan
motor locked
08 P5 Outdoor Compressor-Top Temp Over-increase
Shortage or leakage of refrigerant, piping clogging, Fan
motor lock