Periodical Maintenance - Hitachi HARC70-CE1 Manual De Instalación Y Funcionamiento

SERVICE AND CHECKING FOR HARC70-CE1
Nº Phenomenon
Indication of 7-segment
3 shows "44".
(Only HARC70-CE1)
Indication of 7-segment
shows "61". After
identify the address
of chiller unit having
4 abnormal transmission
with Check mode,
check as described in
the right side to the
appropriate chiller unit.
Control function of
chiller unit over the
5 upper equipment does
not activate. (entire
control)
Indication of 7-segment
of control PCB in chiller
unit shows "03" alarm.
6 (transmission
abnormality between
HARC70-CE1
and Chiller unit)
6.3.

PERIODICAL MAINTENANCE

Periodical Maintenance is need to keep a best condition of HARC70-CE1.
Ambient Temperature
- Check the cabinet the internal temperature of HARC70-CE1 is too high or near.
- Check the temperature of HARC70-CE1 is too high.
- Check dusts, fine metal powder, wires exit or not in the cabinet.
Display
- Check the Display is LED (POW).
- Check LED for transmission state (PAC,IRP) is ON/OFF.
- Check 7-Segment does not indicate except "00".
Attachment, Connected Part
- Check to ensure that the mounting screws, power, transmission cable screws are
tightened firmly.
- Check to ensure that the other screws are tightened firmly.
WARNING:
When cleaning HARC70-CE1, do not use thinner to avoid color change and melting of the
painted surface.
Items to be checked
Check if manufacturer's specified transmission
cable connected with chiller unit is used.
Check if transmission cable connected with chiller
unit is wired along power source wire.
Check if end terminal resistance and quantity on the
transmission cable between chiller unit and
HARC70-CE1 are set correctly with chiller unit.
Check if transmission circuit is operating normally
upon the self-inspection.
Check if the power source of chiller unit is ON.
Check if manufacturer's specified transmission
cable connected to chiller unit is used.
Check if transmission cable connected with chiller
unit is wired along power source wire.
Check if end terminal resistance and quantity on
the transmission cable between chiller unit and
HARC70-CE1 are set correctly with chiller unit.
Check if transmission circuit is operating normally
upon the self-inspection.
Check if the power source of chiller unit is ON.
Check if chiller unit is set in local mode.
Check if manufacturer's specified transmission
cable connected to chiller unit is used.
Check if transmission cable connected with chiller
unit is wired along power source wire.
Check if end terminal resistance and quantity on
the transmission cable between chiller unit and
HARC70-CE1 are set correctly with chiller unit.
Check if transmission circuit is operating normally
upon the self-inspection.
Check if the power source of HARC70-CE1 is ON.
/
6 11
Actions
2
Use Twist pair cable (0.75mm ).
Provide a space of at least 150mm
between wires.
Only one end resistance should be
set in one system. (Resistance
between wire will be approx. 150Ω.)
End resistance should be set to the
transmission wire of chiller unit.
Chiller unit should be turned ON.
2
Use Twist pair cable (0.75mm ).
Provide a space of at least 150mm
between wires.
Only one end resistance should be
set in one system. (Resistance
between wire will be approx. 150Ω.)
End resistance should be set to the
transmission wire of chiller unit.
Chiller unit should be turned ON.
Chiller unit should re-set to
remote mode.
2
Use Twist pair cable (0.75mm ).
Provide a space of at least 150mm
between wires.
Only one end resistance should be
set overall. (Resistance between
wire will be approx. 150Ω.)
End resistance should be set to the
transmission wire of chiller unit.
HARC70-CE1 should be turned ON.