Main Safety Devices - Hitachi RAS-4FSNME1 Instruction Manual

MAIN SAFETY DEVICES

more than 3 hours, re-measure the insulation resistance.
(Current may be required for longer, depending on
the air conditions, the pipe length or the condition of
the refrigerant). Check the insulation resistance and
re-connect the compressor. Where the earth leakage
breaker is tripped, check the recommended size: see in
chapter "11.2.2 Cable sizes and main breaker switch".
• Check that all components in the system are correctly
connected to the power line. If the outdoor unit is not
correctly connected, the alarm code "05" will appear.
• Check to ensure that the stop valves of the outdoor unit are
fully opened, and then start the system.
• Check to ensure that the switch on the main power
source has been ON for more than 12 hours, to warm the
compressor oil by the oil heater.
13 MAIN SAFETY DEVICES
Compressor protection: The compressor is protected by pressure switch, this switch stops the compressor when the discharge
pressure exceeds the set value.
Oil heater: this band-type heater protects against the formation of foam on the oil during cold starts and remains enabled when the
compressor is at a standstill.
Model
Pressure Switches
High
Fuse capacity
1N~ 230V 50Hz
3N~ 400V 50Hz
Oil heater capacity
CCP Timer
Setting Time
Fuse capacity (2 Fan)
DC 310V
3N~ 400V 50Hz
30 PMML0532 rev.1 - 12/2020
RAS-(4-6)FSVNME1
For Compressor
-
Cut-Out MPa
Cut-In MPa
A
A
W
-
min.
For Fan Module
A
A
Pay attention to the following items while the system is running:
• Do not touch any of the parts by hand at the discharge gas
side, since the compressor chamber and the pipes at the
discharge side are heated higher than 90°C.
• DO NOT PUSH THE BUTTON OF THE MAGNETIC
SWITCH(ES), it will cause a serious accident.
• Do not touch any electrical components for more than three
minutes after turning OFF the main switch.
• Confirm that the gas line stop valve and the liquid line stop
valve are fully open.
• Confirm that the leakage of the refrigerant does not exist.
The flare nuts are sometimes loosened by vibration.
• Check whether or not the electrical wiring of the indoor units
and the outdoor units are connected as shown in the chapter
"11 Electrical wiring".
RAS-(4-6)FSNME1
Automatic Reset, Non-Adjustable (each one for each compressor)
4.15
3.20
50
-
24
Non-Adjustable
3.15
-
RAS-(8-12)FSXNME1
- -
32 50
24 40.8(x3)
3
5 -
- 10