Functions And Factory Settings Of The Dip Switches - Mitsubishi Electric CAHV-R450YA-HPB Service Manual

[ VII Control ]

[1] Functions and Factory Settings of the Dip switches

VII Control
1. Factory Switch Settings (Dip switch settings table)
SW Function
1
2
3
4
5
SW4 Model setting
6
7
8
9
10
Freeze-up protection
1
setting
Scheduled operation
2
display
3 Model setting
4 Model setting
Recovery conditions after
5
forced stoppage
SW5
Power supply option to the
6
communication circuit
Remote water-temperature
7
setting
Water-temperature control
8
option
9 Individual/Multiple system
10 Display mode switch 7
1 Remote reset
Auto restart after power
2
failure
3 Water-temperature control
SW6
Pump-thermistor interlock
4
setting
5 Display mode switch 1
6 Display mode switch 2
7 Display mode switch 3
8 Display mode switch 4
9 Display mode switch 5
10 Display mode switch 6
"-" in the table indicates that the function in the corresponding row will be disabled regardless of the actual switch setting.
The factory setting for these items is OFF.
Refer to page 35 for how to reset errors.
HWE22020
Usage
Starts the pump when both the outside and
water temperatures drop to prevent water
pipe freeze up.
Turns on and off the remote display during
scheduled operation.
Selects what the operation restoration
condition will be based on after the unit
was forced to stop based on the external
thermistor reading (water outlet
temperature).
Switches between supplying or not
supplying power to the communication
circuit.
Allows or disallows the water temperature
to be set using analog signals from a
remote location.
Selects either the external water
temperature sensor or the built-in sensor
to be used to control water temperature.
Selects between individual and Multiple
system
This switch is used in combination with dip
switches SW6-5 through 6-10 and push
switches SWP 1, 2, and 3 to configure or
view the settings when performing a test
run or changing the system configuration.
Enables or disables the error to be reset
from a remote location.
Enables or disables the automatic
restoration of operation after power failure
(in the same mode as the unit was in
before a power failure).
Switches between inlet-water-
temperature-based control and outlet-
water-temperature-based control.
Interlocks or does not interlock the
operation of the pump with the external
thermistor.
(Effective only when SW5-8 is set to ON.)
These switches are used in combination
with dip switches SW5-5~10 and push
switches SWP 1, 2, and 3 to configure or
view the settings when performing a test
run or changing the system configuration.
Factory setting
Circuit board OFF setting
Depends on
Leave the setting as it is.
the unit
The outside temperature
condition for Freeze-up
OFF
protection is 1°C
Leaves the operation
display on during the period
OFF
in which the unit is
scheduled to be stopped.
OFF Leave the setting as it is.
OFF Leave the setting as it is.
OFF External thermistor
Does not supply power to
ON
the communication circuit.
Disallows the water
OFF temperature to be set using
external analog signals.
OFF Built-in sensor on the unit
OFF Individual system
OFF Changes the 7-segment LED display mode.
Disables the error to be
ON reset from a remote
location.
An alarm will be issued
ON
when power is restored
after a power outage.
Outlet-water-temperature-
OFF
based control
The pump turns on when
the operation switch is
OFF turned on regardless of the
Thermo-ON/Thermo-OFF
status.
OFF Changes the 7-segment LED display mode.
OFF Changes the 7-segment LED display mode.
OFF Changes the 7-segment LED display mode.
OFF Changes the 7-segment LED display mode.
OFF Changes the 7-segment LED display mode.
OFF Changes the 7-segment LED display mode.
- 79 -
Setting
ON setting
timing
At a reset
Same as when set to OFF. At a reset
Turns off the operation
display during the period in
At a reset
which the unit is scheduled
to be stopped.
At a reset
At a reset
Built-in thermistor At a reset
Supplies power to the
Any time
communication circuit.
Allows the water
temperature to be set using At a reset
external analog signals.
External water temperature
At a reset
sensor
Multiple system At a reset
Any time
Enables the error to be
reset from a remote At a reset
location.
Automatically restores
operation after power At a reset
failure.
Inlet-water-temperature-
At a reset
based control
Interlocks the operation of
the pump with the Thermo- At a reset
ON/Thermo-OFF status.
Any time
Any time
Any time
Any time
Any time
Any time
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