Description Of The Switch Board - OEM DC BWA-SS-7 Installation And Maintenance Instructions Manual

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When test or repair the machine, the compressor,
water cycle pump and outdoor fan motor can
be force manual startup.
Water Pump : Control the Water Cycle Pump
E-Heater : Control the Electrical Heater 1 and 2
O-Warm Water : Control the 3 way valve turn to the Water Tank
Heating side ( B side )
I-Room Heating : Control the 3 way valve turn to the Room
Heating side ( A side )
Reserved : Invalid
NOTE!
The manual switch board is use only if
the necessary for test or rep a ir.
When the heat p u mp is running normally ,
the switch board must be in normal state.
1 The switch board is only for emergency, such as circuit boards were broken; and it must be operated by
service engineer only.
2 When control systems are normal, it is forbidden to operate the switch board; the switch boards are only
available when circuit board or compressor broken; before using the switch board, it must set and ensure the
OPER. is OFF at the display.
A> NORMAL:
switch boards must keep the position as drawing then allow heat pump to runs normally.
B> ROOM HEATING:
room heating only; switch boards must keep the position as drawing then allow heat pump to heat room,
the feed water temperature is fixed with 40 ; before using this mode, it must set and ensure the OPER. is
OFF at the display .
C> WARMEATER:
water tank heating only; switch boards must keep the position as drawing then allow heat pump to heat
water tank, the feed water temperature is fixed with 70 ; before using this mode, it must set and ensure the
OPER. is OFF at the display.

Description of the switch board

Function
OPER.OFF
Connect to the PCB 2 ( CN1 L-IN)
,
HDO
CSP