Tmx60 Pins - Sanyo KH2442 / CH2442 Service Manual

(13) TMX60 pins

When shorting TMX60 pins on the indoor and outdoor PCBs, operations shown on the above table will be per-
formed on each indoor and outdoor unit. Use TMX60 pins to perform a quick check.
NOTE
• When checking pin operation, stop the indoor and outdoor units with the remote control unit.
Shorting CK.L or CK.H pin of the outdoor PCB
When shorting the cooling pin (CN8) with normal operation
• Relay RY3 is turned ON for 3 seconds
• Relay RY4 is turned ON for 3 seconds
• Turn ON relay RY2 under the above condition
It will take about 18 seconds before cooling operation begins.
Shorting the heating pin (CN9) with normal operation
• Relays RY3 and RY4 are turned ON for 3 seconds
• Relay RY3 is turned ON for 3 seconds
• Turn ON relay RY2 under the above conditions
It will take about 18 seconds before heating operation begins.
NOTE
• The outdoor unit operates independently regardless of the indoor unit's operation. However, the outdoor unit
does not defrost.
• The indoor and outdoor units stop when the outdoor protection apparatus activates during the checking
operation, and automatically restarts, unlike in normal operation.
The outdoor fan motor operates at the "LL" fan speed.
The outdoor fan motor oprates at the "H" fan speed.
The magnet switch (52C) turns ON.
The outdoor fan motor operates at the "H" fan speed.
The outdoor fan motor operates at the "LL" fan speed.
The magnet switch (52C) turns ON. If relay RY1 is
turned ON, the 4-way valve (20S) turns ON.
IV - 45
4. Service procedures
SM830082 SM830082
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