Sanyo CHX06052 - Manual (Page 166)

4-4
PCB and Functions
1. Outdoor Unit Control PCB
CN15 The control operations that are shown below are when you short-circuit this cooling inspection
pin located on the outdoor unit control PCB.
1.Thermistor inspection
Thermistor
Detection results
Normal Error
Discharge temperature (TD) LED1 lights up
LED1, 2 turns off
Outdoor temperature (TO) LED2 lights up
Heat exchanger temperature (C1) LED1 lights up
Heat exchanger temperature (C2) LED2 lights up
Air inlet temperature (TS) LED1 lights up
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2. Turn ON the four-way valve for one second
3. Forced cooling operation
CN50 This pin is used to perform automatic address while operating the compressor. Normally,
automatic address can be performed in Heating mode, short-circuit this pin to perform
automatic address when operation is in Cooling mode.
CN33 3P plug (black): Terminal plug of the communications circuit
A connecting socket (2P, black) for short circuiting is attached to the terminal plug at the
time of shipment from the factory.
When multiple systems are operated in centralized control, leave the connecting socket in
place at only 1 of the outdoor unit in system address, and then replace the socket 2 to 3
from the outdoor unit (other than 1). If multiple connecting sockets are left in place while
operated in centralized control, communications trouble will occur.
When there is only single (system address 0) connecting socket of 1 system, do not remove
the connecting socket. (It is for the warning “ ”.) •
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CN028 2P plug (white): Silent mode operation pin
Operates the outdoor fan and compressor frequency with a limitation.
When relay turns ON, operating noise becomes low.
Silent
CN028
Relay
(field supply) Power
source
External contact
(Timer input, etc.: field supply)
Outdoor unit control PCB
Note 1: Make the length of the wire between the outdoor unit control PCB to Relay within
6-9/16 ft.
2P socket with lead wire (Service parts: Parts code/623-161-2098)
Relay field supply contact input specification DC5V and 0.5mA
(Recommended relay; The Fuji Electric Co. /HH62SW nano-contact point
correspondence)
Use commercially available timer. (Omron “H5” daily time switch, etc.)
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