Harvest assist solenoid
1. Test using the controller’s indicator lights. Push and release the Harvest button. The Hot
Gas indicator light will be on. At the same time the Harvest Assist Solenoid will be powered. If
the ice on the evaporator is thin, the solenoid will extend. If the ice is nearly full sized, the
solenoid will press against the ice until it releases from the evaporator, then the solenoid probe
will extend. If the probe extends, the solenoid is good. If not, do a voltage check. Unplug the
high voltage harness from the harvest assist solenoid. Attach a voltmeter to the harness
connector. Push and release the Harvest button. There should be full voltage at the connector.
If there is and the solenoid does not extend, replace the solenoid. If full voltage is not present,
check voltage at the controller. If there is no voltage, check voltage from the controller to
ground. The hot gas / harvest assist pin is 5. If there is voltage from that pin to ground, but low
voltage at the solenoid harness connection, the harness has a broken wire or poor connection
and must be replaced. If the voltage to ground is low, the controller should be replaced.
Note: The coil of this valve is internally rectified, will normally show infinite resistance when tested with
an ohmmeter.
Hot Gas or Vapor Valve
1. Test using the controller’s indicator lights. If
the unit is running, or has been off for more
than 4 minutes, push and release the Harvest
button. The Hot Gas indicator light will be on
and the hot gas valve will be energized. The compressor will force discharge gas into the
evaporator inlet, warming it. If the evaporator inlet does not warm up, do a voltage check. Shut
the unit off by holding the Off button in for 3 seconds. Unplug the high voltage harness from
the hot gas solenoid. Attach a voltmeter to the harness connector. Wait 4 minutes. Push and
release the Harvest button. There should be full voltage at the connector. If there is and the
solenoid does not open, replace the solenoid coil. If full voltage is not present, check voltage at
the controller. If there is no voltage, check voltage from the controller to ground. The hot gas
pin is 5. If there is voltage from that pin to ground, but low voltage at the solenoid harness
connection, the harness has a broken wire or poor connection and must be replaced. If the
voltage to ground is low, the controller should be replaced.
2. Test with an ohmmeter. Disconnect electrical power. Unplug high voltage harness from hot
gas or vapor valve. Measure resistance of hot gas or vapor valve coil. If open, replace the coil.
September 2006 Page 70
Test Procedures - Loads
This light will be ON during harvest.
Both the Hot Gas Valve coil and the
Harvest assist solenoid coil will have
power when this light is ON.
Содержание C0522SR-1
Страница 96: ...Wiring Diagram C0522R C0530R C0630R C0830R C1030R Single Phase after 9 09 September 2009 Page 96 ...
Страница 98: ...Wiring Diagram C0522R C0530R C0630R C0830R C1030R Three Phase after 9 09 September 2009 Page 98 ...
Страница 126: ...Wiring Diagram C0630R 6 C0830R 6 C1030R 6 September 2009 ...
Страница 127: ...Wiring Diagram C0830R 63 C1030R 63 September 2009 ...