Trane ComfortLink II 4TWZ0036B1000A Service Facts page 14

J1
To Coil on
EEV
J6
See Table 6
Control Input
24 VAC Stage/Mode
Note: Close Valve and Open Valve Tests are active in any mode of operation
Test Pins: OPEN, CLOSE, TEST (See EEV Board drawing for locations)
Close Valve Test
- Touch CLOSE pin to TEST pin.
EEV drives closed (5 seconds max) and stays closed for 1.5 minutes (90 seconds).
1) Status LED will be flashing.
2) Gauges should indicate suction pressure dropping.
• Valve is working.
• LPCO may trip.
Note: The Close Valve Test will exit after 1.5 minutes (90 seconds) and will not reinitiate (requires a break and make to
initialize). To clear faults stored in memory, apply a jumper between Close and Test pins for 10 seconds.
Open Valve Test
- Touch OPEN pin to TEST pin.
EEV drives open (5 sec max) and stays open for 30 seconds.
1) Status LED will be flashing.
2) Temperature probe should indicate superheat falling.
• Valve is working.
Note: If jumper is left on pins, the OPEN VALVE TEST will be cleared after 30 seconds and will not reinitiate (requires a
break and make to reinitialize).
Exit Test Mode
- The Open Valve Test or Closed Valve Test can be cancelled by jumping to the opposite mode Test pin.
The system will return to normal super heat control.
Test mode will cancel if:
1) Unit enters Defrost
2) Stage-Delay occurs
3) Y1 or Y2 input(s) are lost
14
EEV CONTROL BOARD TEST POINTS
OPEN
CLOSE
DC V TEST
POINT
Test Pins
OPEN
CLOSE
TEST
STATUS LED
(Green)
Fault LED
(Red)
J7
See Table 8
Suction Line
Pressure
Transducer Input
J10
See Table 7
Suction Line
Temperature
Sensor Input