Zanotti Zer0 120, Руководство по ремонту

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side port are not the same. If they are the same
pressure. The High side port should be significantly
lower in pressure
Disconnect CIS and watch high side pressure. If
pressure does not adjust and acts the same.
Replace or rebuild valve.
Symptoms: Not cooling (cooling mode only)
Cause
: Stuck open Hot gas valve
What it does: The Hot Gas Valve is a normally closed
valve. During cooling operation, it stays closed.
Allowing the refrigerant to pass through the
condenser following the correct piping.
If the valve is stuck open. Hot gas will enter the
evaporator. Causing the unit to not cool efficiently or
potentially heat.
Diagnosis:
Install gauge hose to High side and low side port, and
receiver tank port and either:
A. Follow low side pump down procedure.
If low side rises above 0 psigg, Replace or
rebuild Hot gas valve
B. Run unit in cool for 15 minutes before
hand (Make sure unit does not defrost or
heat) Test temperature at defrost valve
on "IN" and "OUT" piping.
The temperature should be relative to the
surrounding area temperature. If there is any icing or
heat at these pipes. There is an internal valve leak-by.
Symptoms: Instant High Discharge Pressure (cooling
mode)
Cause:
Stuck closed Condenser inlet valve
4.12.3 Replacing solenoid coil
It is not necessary to remove the refrigerant charge to
replace the coil (see Figure 16).
1. Remove coil snap cap, voltage plate and
coil assembly. Disconnect leads and
remove coil junction box if necessary.
2. Verify coil type, voltage and frequency. This
information appears on the coil voltage plate
and the coil housing.
3. Place new coil over enclosing tube and then
install voltage plate and snap cap.
Figure 4-1 Solenoid valve
1. Snap Cap
2. Voltage Plate
3. Coil assembly
4. Enclosing tube
5. Plunger assembly
6. Valve body assembly
7. Direction of flow
Figure 18 - Solenoid Valve Components