Mitsubishi Electric CAHV-R450YA-HPB Installation & Operation Manual page 50

When using a local controller, refer to the table below for the types of input/output signals that are available and the
operations that correspond to the signals.
External Input/Output
Input Dry contact
type
(a) UNIT OPERATION
(b) MODE CHANGE 2
(c) PRIORITY MODE
(d) MODE CHANGE 1
(e) ANTI FREEZE
(f) FAN MODE
(g) FLOW SWITCH
(h) PUMP INTERLOCK
(i) PEAK-DEMAND
CONTROL
Analog
Input type
(j) WATER TEMP SETTING/CAPACITY
CONTROL
(k) EXTERNAL WATER SENSOR
(optional)
(l) EXTERNAL WATER SENSOR
(optional)
Output Contact type
type
(m)ERROR INDICATOR Close/Open
(n) OPERATION
INDICATOR
(o) PUMP OPERATION
COMMAND
(p) EMERGENCY
SIGNAL
(q) DRAIN PAN
HEATER SIGNAL/
DEFROST SIGNAL
Selects either the
drain pan signal or
defrost signal by Item
code 1056
RC/M- REMOTE
NET CONTROLLER
M-NET
Centralized controller
ON (Close)
Run/Stop The unit will go into operation when the water
temperature drops below the preset temperature.
Heating The unit will go into operation when the water
Eco/Heating temperature drops below the temperature setting
for "Water Temp Setting C." (Heating ECO mode)
COP/Capacity The unit will operate in the energy-efficient mode
(COP priority mode).
Hot The unit will go into operation when the water
water/Heating temperature drops below the temperature setting
for "Water Temp Setting B."
On/Off The unit will operate in the Anti-Freeze mode (with
the target temperature between 25-35ºC) when
the contact status of (a) "Unit Operation" is "Stop"
OR the ON/OFF button on the remote controller is
turned off.
Forced/Normal The fan will remain in operation after the
compressor has stopped (including when the
OPERATION status is "STOP").
Normal/Error The unit is allowed to operate.
Normal/Error The unit is allowed to operate.
On/Off The unit will operate at or below the maximum
capacity level that was set for the Peak-demand
control setting. (If the maximum capacity setting
for item (c) above "Priority mode" is below the
setting for the Peak-demand control setting, the
unit will operate at whichever capacity is the
smaller.)
Action
Water temperature or capacity control can be set by using the external analog input to the
CN905 on the MAIN circuit board. One analog input type can be selected from the following
types: 4-20 mA, 1-5 V, 0-10 V, or 2-10 V. Selection between drain pan output and defrost output
can be made using the item code 1051.
Conditions in which the contact closes
(turns on)
The unit has made an abnormal stop.
Close/Open The "Unit Operation" contact (item (a) above) or
the ON/OFF button on the remote controller is ON.
Close/Open (1) When SW5-8 is set to ON
The pump will operate according to the
Thermo-ON/OFF status of the unit.
(2) When SW5-8 is set to OFF
The pump will operate according to the status
of the "Unit Operation" contact or the ON/OFF
button on the remote controller button.
Close/Open Water temperature has dropped below the
Booster Heater Operation Water Temperature
(TWL1 value)(Item code 1057) and the outside
temperature (TAL1 value)(Item code 1058).
Close/Open In case of the defrost signal when item code 1056
is "1", at least one of the circuits is in defrost
mode.
PAR-W31MAA
Terminal between units
AE-200
OFF (Open)
The unit will stop except when the unit is in
the Anti-Freeze mode.
The unit will go into operation when the
water temperature drops below the
temperature setting for "Water Temp
Setting A." (Heating mode)
The unit will operate at the maximum
capacity setting (Capacity priority mode).
The unit will go into operation when the
water temperature drops below the
temperature setting for "Water Temp
Setting A." (Heating mode)
The unit will operate according to the status
of the "Unit Operation" contact (item (a)
above) or the ON/OFF command from the
remote controller.
The fan will stop when the compressor
stops.
The unit will not operate.
The unit will not operate.
The unit will operate at or below the
maximum capacity setting for either
"Capacity Priority Mode" or "COP Priority
Mode" that was selected for item (c)
"Priority Mode" above.
-
-
Conditions in which the contact opens
(turns off)
During normal operation
The "Unit Operation" contact (item (a)
above) or the ON/OFF button on the remote
controller is OFF.
Under all conditions other than the ones
listed on the left
Water temperature is at or above
"TWL1+2ºC" or the outside temperature is
at or above "TAL1+2ºC".
In case of the drain pan signal when item
code 1056 is "0", the outside temperature is
above 1ºC or the outside temperature has
risen above 3ºC after the conditions has
been met under which the contact turns on.
In case of the defrost signal when item code
1056 is "1", both circuits are not in defrost
mode.
50
Terminal
block/connector
TB6 15-16
CN3N 1-2
CN3S 1-2
TB6 13-14
TB6 22-24
TB6 15-19
CN221 1-3
TB6 11-12
CN3K 1-2
Terminal
block/connector
CN905 1-3
TB6 T1-T2
TB6 T3-T4
Terminal
block/connector
TB5 74-75
TB5 72-73
TB5 70-71
CN513 1-3
CN513 5-7
TB6 RA-RB
TB3 A/M1-B/M2
TB7 A/M1-B/M2