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7
Water to Water Heat Pump (WTW)
7.7.3 DIP Switch Function
Located on the C.B. printed circuit board are 7 sets of small white switches known as DIP switches. The DIP switch number is print-
ed on the circuit board next to the relevant switches. The word ON is printed on the circuit board and on the DIP switch block itself.
To move the switch you will need to use a pin or the corner of a thin metal ruler or similar.
DIP switch settings are listed below in Table 7.7.1.
Only an authorised installer can change DIP switch setting under one's own responsibility according to the installation condition.
Make sure to turn off heat pump unit power supplies before changing the switch settings.
DIP switch
SW1 SW1-1
SW1-2 Abnormal history clear
SW4 SW4-1
SW4-2
SW5 SW5-1
SW5-2 Power failure automatic recovery*1
SW5-3
SW5-4
SW5-5
SW5-6
SW6 SW6-1
SW6-2
SW6-3
SW6-4
SW6-5
SW6-6
Model select
SW6-7
SW6-8
SW7
SW7-1
SW7-2
*2
SW7-3
SW7-4
SW7-5
SW7-6
SW8 SW8-1
SW8-2
SW8-3
SW9 SW9-1
SW9-2
SW9-3
SW9-4
Note:
*1 "Power failure automatic recovery" can be set by either remote controller or this DIP SW. If one of them is set to ON, "Auto
recovery" activates.
*2 Please do not use SW7-3, 4 usually. Trouble might be caused by the usage condition.
7.7.4 Connecting inputs/outputs
Inputs/Outputs
Name
Connector
MC
TB-U/V/W
63H
63H
63HS
63HS
FS
63L
TH3
TH3
TH4
TH4
TH7
TH7/6
TH8
CN6
TH32
TH32
TH33
TH33
TH34
TH34
LEV-A LEV-A
CNM
CNM
B-254
Function
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Item
Motor for compressor
(Mediate Power board)
High Pressure switch
High Pressure Sensor
Flow switch (Ambient loop)
Thermistor (Ref. liquid temp.)
Thermistor (Discharge temp.)
Thermistor (Outdoor temp.)
Thermistor (Heat sink temp.)
Thermistor (Ambient loop inlet temp.)
Thermistor (Comp. surface temp.)
Thermistor (Ambient loop outlet temp.)
Linear Expansion Valve
Connection for option
OFF
—
Normal
Clear
—
—
—
No auto recov-
Auto recov-
ery
ery
—
—
—
—
—
—
—
Heat pump setting
—
—
—
—
—
—
—
—
—
—
<Table 7.7.1>
1 3
1 2
1
4
1 3
TH33
TH32
TH7/6
TH3
(YE)
(BK)
(RD)
(WH)
1
7
CNF1
(WH)
1
3
CNDC
(PK)
1
CN2
(RD)
CNAC
(WH)
CNS
(WH)
3 1
ON
Effective timing
―
—
Always
―
—
―
—
―
—
When power supply
ON
—
—
―
—
—
—
―
—
―
—
—
―
—
—
―
—
―
—
―
—
―
—
―
—
―
—
—
—
—
―
—
―
Always
2 1
1 2
TH4
TH34
(WH)
1
5
1 3
(RD)
LEV-A
63HS
1 3
1 3
(WH)
(WH)
63L
63H
(RD)
(YE)
1
14
LED2
LED1
CNM
(WH)
7
1 2
CN4
(WH)
SV1/CH
SV3/SS
21S4
(GY)
(WH)
(GN)
1 3
1 3
1 3
Default
settings
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
1 3
CNDM
(WH)
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