Hoshizaki 73168 Manual De Usuario

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The refrigeration system cartridge should not be removed until the refrigerant 
has been properly recovered or the refrigeration system has been properly 
pumped down. For refrigeration system repairs, the refrigerant recovery 
procedure must be used. See "IV.B.1. Refrigerant Recovery Procedure." For
non‑refrigeration system repairs, see "IV.B.2. Pump‑Down Procedure." Do not
discharge the refrigerant into the atmosphere.

1) Remove the front panel. Move the power switch to the "OFF" position, then unplug the

unit.

2) Remove the left side panel.
3) Connect the gauge manifold hoses to the receiver service valve (high-side) and the 

compressor access valve (low-side). See Fig. 1.

4) Run in the receiver service valve stem a couple of turns for high-side system access.

Note: Be sure the high-side gauge manifold hose is on the receiver service valve 

before opening the receiver service valve.

5) Using proper refrigerant practices, recover the refrigerant and store it in an approved 

container. Do not discharge the refrigerant into the atmosphere.

6) When the recovery is finished, close the gauge manifold valves and back out the 

receiver service valve stem all the way and tighten.
Note: Be sure the receiver service valve stem is backseated all the way out and tight.

7) Close the rail high and low-side service valves. Run in the rail service valve stems all 

the way until tight.
Note: Be sure the rail high and low-side service valve stems are seated all the way in 

and tight.

8) Disconnect the rail refrigerant tubes from the rail service valves. Use a backup wrench 

when loosening the fittings. See Fig. 1.

9) Remove the screw securing the rail service valve bracket.

10) Disconnect the power supply cord connector, rail thermistor connector, and the 

perimeter heater/rail fan motor connector.

11) Remove the wire cover below the control box.
12) Remove the upper and lower attachment nuts and washers from the control box and 

the hex head bolt from the base of the refrigeration cartridge. See Fig. 1.