Troubleshooting

IMPORTANT: Only qualified personnel should service internal components or electrical wiring.

WARNING: If repairs are to be made to a product system, remove quick disconnects from the applicable product tank, then relieve the system pressure before proceeding. If repairs are to be made to the CO2 system, stop dispensing, shut off the CO2 supply, then relieve the

system pressure before proceeding. If repairs are to be made to the refrigeration system, make sure electrical power is disconnected from the unit.

IMPORTANT: The following CO2 and liquid disconnects disconnecting and connecting procedure for syrup tank replacement or filling syrup tank in place must be performed in order as follows:

1.To disconnect syrup tank from Unit syrup system.

A.Disconnect liquid disconnect from syrup tank. NOTE - Disconnecting liquid quick disconnect from syrup tank first prevents syrup from backflowing through Unit syrup flow regulator which may alter regulator adjustment.

B.Second, disconnect CO2 quick disconnect from syrup tank.

2.To connect syrup tank into Unit syrup system.

A.First, connect CO2 quick disconnect to syrup tank to pressurize tank.

B.Second, connect liquid quick disconnect to syrup tank.

TROUBLESHOOTING CONTROL PANEL SWITCHES AND FAULT MESSAGES

Trouble		Probable Cause		Remedy
ONE OR MORE CONTROL	A.	Inoperable switch(s) on control	A.	Call qualified Service Person.
PANEL SWITCHES NOT		panel switch module.
OPERATING.
	B.	Master circuit board not	B.	Call qualified Service Person.
		operating properly.

ALL CONTROL PANEL	A.	Electric power disconnected	A.	Restore electric power to Unit.
SWITCHES NOT OPERATING.		from Unit.

B.Master circuit board not operating properly.

B.Call qualified Service Person.

PARTIAL MESSAGE OR DULL	A.	Extremely low voltage.	A.	Call qualified Service Person.
(POORLY ILLUMINATED)
DISPLAY.

ONE OR MORE FAULT	A.	External sensing device failing	A.	Call qualified Service Person.
MESSAGES NOT		to signal master circuit board,
OPERATING.		which in turn signals fault
		message display.
	B.	Master circuit board not	B.	Call qualified Service Person.
		operating properly.
	C.	Fault message display module	C.	Call qualified Service Person.
		not operating properly.

ALL FAULT MESSAGES NOT A. No electrical power to Unit.

OPERATING.

B. Master circuit board not operating.

A.Connect electrical power to Unit.

B.Call qualified Service Person.

17	312030002

R-404A specifications

Cornelius R-404A is a synthetic refrigerant blend widely used in various refrigeration and air conditioning applications. Composed primarily of three components—R-125 (44%), R-143a (52%), and R-134a (4%)—this blend is designed to provide effective cooling performance in both commercial and industrial environments. Its popularity can be attributed to its efficient thermodynamic properties, making it a suitable choice for low and medium temperature refrigeration systems.

One of the hallmark features of R-404A is its high energy efficiency. As a refrigerant, it offers excellent performance in heat transfer capabilities, which translates to lower energy consumption and operational costs. R-404A operates effectively within a wide range of evaporating temperatures, allowing it to serve various applications, from refrigerated display cases to cold storage facilities. The refrigerant's low glide temperature helps maintain consistent temperatures in these applications, enhancing food safety and product quality.

R-404A does not belong to the ozone-depleting substances category, making it an environmentally friendly choice. However, it is important to note that R-404A does have a significant global warming potential (GWP) of 3,922, raising concerns regarding its long-term environmental impact. As awareness of climate change increases, industries are shifting towards alternative refrigerants with lower GWPs, but R-404A remains prevalent in many existing systems.

In terms of compatibility, R-404A is non-toxic and non-flammable, making it a safe choice for use in commercial environments. Additionally, it is compatible with oils traditionally used in refrigeration systems, simplifying retrofitting processes when upgrading from other refrigerants. R-404A is also designed to work with standard refrigeration components, ensuring compatibility with existing equipment.

To maximize efficiency and performance when using R-404A, proper system design and maintenance are critical. Regular checks for leaks, appropriate charge levels, and routine maintenance can help extend the life of the system while ensuring optimal performance of R-404A as a refrigerant. As industries continue to adapt to evolving regulations and environmental concerns, the future of R-404A will likely involve the transition to lower-GWP refrigerants, but its robust features and performance continue to make it a staple in the refrigeration landscape.