Page 31
XC21 SERIES
E33 JUMPER (TEST) PINS
Placing the JUMPER ON the E33 jumper pins (see page 22 for location of E33 jumper pins) allows the technician to
S Clear compressor anti−short cycle delay.
S Clear five−strike fault lockouts High / Low pressure switches and High Discharge Temperature Sensor.
S Setting the unit size (capacity) code. Procedure provided on page 42).
NOTES:
1 Placing a JUMPER ON the E33 pins will not reset (reboot) the A175 Control. The only way to reset the outdoor unit
is to cycle the 24VAC power to the outdoor unit’s A175 Main Control.
2 If the jumper remains on the E33 pins for longer than five seconds, the A175 Main Control will ignore the JUMPER
ON E33 pins and revert to normal operation.
Y1 Active
Place a JUMPER ON
1
the E33 pins for longer than one
second
2
. Then remove jumper and place in JUMPER
OFF position.
Clears any short cycle lockout and five strike fault lockout
function, if applicable. No other functions will be executed
and unit will continue in the mode it was operating.
JUMPER
OFF
JUMPER
ON
FACTORY DEFAULT
JUMPER SETTING
Figure 18. Multi−Function E33 Jumper (Test) Pin
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