Ice-O-Matic CIM0320, Техническое и сервисное руководство

Страница: 58 / 68

ELEVATION SERIES CIM CUBER REFRIGERATION SECTION
55
Hot Gas Valve
The Hot Gas Solenoid Valve opens to provide gas to the Evaporator during the Harvest Cycle.
Troubleshooting - Hot Gas Valve
Should the valve not open at the initiation of the Harvest Cycle (R3 LED ON), verify voltage at the
coil of the solenoid. If no voltage is present, verify Molex is properly connected at Board and
Voltage is present at Molex. If Voltage is present at coil, verify resistance through coil. If coil
shows open, replace the coil. If coil checks out, place magnetic donut on top of coil. If valve will
not open, replace Hot Gas Valve body. Should suction pressure run high, check temperature of
the inlet and outlet line of the Hot Gas Valve. Should be greater than 10 degree F. different. If
less than 10 degrees F., the Valve is leaking and should be replaced. (See also pg.44.)
Liquid Line Solenoid
The Liquid Line Solenoid opens to allow refrigerant to flow from the Receiver on Remote Sys‐
tems. It is energized by R1 along with the Remote Fan Motors. Diagnosis of Liquid Line Solenoid
is much the same as the Hot Gas Solenoid Valve (see above.)
Mixing Valve
The 220 psig. Mixing Valve (or LAC) Is used to maintain head pressure in low ambient .
Troubleshooting - Mixing Valve
In lower ambients, the Mixing Valve should be bypassing the Condenser to maintain head pres‐
sure. The inlet and outlet lines at the Condenser would be the same temp. in bypass mode. In
warmer ambients the Mixing Valve is pushing refrigerant to the Condenser Coil and there would
be approx. 20 degree F. temperature difference. A low charge would be identified by hot inlet
and outlet lines at the Condenser and a hot Receiver. Always verify charge before condemning
the Mixing Valve.