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SERVICE AND CHECKING FOR HARC70-CE1
6
10
6.2.
ACTION WHEN ABNORMAL
The following table indicates possible trouble-shooting upon the abnormal operation in unit.
Power source of HARC70-CE1 should be turned OFF, before starting of check.
Trouble-shooting
Nº
Phenomenon
Despite of power
source is ON, there is
no apparent operation
1
in HARC70-CE1.
(No indication on
7-segment is shown)
Despite of power
source is ON,
Apparently, none of
reaction is seen.
(It shows "11" on the
7-segment.) After
2
displayed "00" on the
7-segment with check
mode, the actual
Chiller unit quantity
shows unconformable
to address.
Items to be checked
Check if power source cable is connected.
Check if power source is supplied.
Check if LED (POW) is lit.
Check if terminal screws are loosened.
Check (PAC) for transmission display is lit.
Check if (IRP) for transmission display is lit.
Check if (IRP) for transmission display
is regularly blinked.
(1~2sec interval)
Check if the address of the chiller unit is set
correctly.
Check if transmission cable with chiller unit is
disconnected.
Check if manufacturer's specified transmission
cable connected with chiller unit is used.
Check if transmission cable connected with chiller
unit is wired along the 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 transmission cable between chiller unit and
HARC70-CE1 are disconnected.
Check if (PAC) for transmission display is ON.
Check if LED (PAC) for transmission display is OFF.
Actions
Connect the power source cable
correctly.
Power source voltage should be
measured. If the measured voltage
shows outside of normal range of
100~240±10%[V], wire systems and
wiring procedures should be
inspected and examined.
Lighting OFF indicates that there is
possibility of the failure of internal
power source. Contact to your
nearest service centre.
Ensure to retighten the terminal
screws.
Check the transmission circuit of
chiller unit by the self-inspection
function. And check the circuit if
transmission circuit of chiller unit is
operating normally.
Check the upper transmission
circuit by self-inspection function.
And check the circuit if transmission
circuit of upper equipment is
operating normally.
Lighting OFF indicates that there is
possibility of the failure of internal
power source. Contact to your
nearest service centre.
Address should be re-set with
referring to the installation
maintenance manual and
operation manual.
Connection of wire should be
examined.
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 is approx. 150Ω.)
End resistance should be set to the
transmission wire of chiller unit.
Chiller unit should be turned ON.
Connection of wiring should be
examined.
Check transmission circuit of chiller
unit by self-inspection. And confirm
if transmission circuit of chiller unit
is operating normally.
Check transmission circuit of chiller
unit by self-inspection. And confirm
if transmission circuit of chiller unit
is operating normally.
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