Table 23 — Operating Modes

MODE NO.

ITEM EXPANSION

DESCRIPTION

01

FSM CONTROLLING CHILLER

Flotronic™ System Manager (FSM) is controlling the chiller.

02

WSM CONTROLLING CHILLER

Water System Manager (WSM) is controlling the chiller.

03

MASTER/SLAVE CONTROL

Lead/Lag Chiller control is enabled.

04

LOW SOURCE PROTECTION

Not currently supported.

05

RAMP LOAD LIMITED

Ramp load (pulldown) limiting in effect. In this mode, the rate at which leaving

 

 

fluid temperature is dropped is limited to a predetermined value to prevent

 

 

compressor overloading. See CRMP set point in the Set Point Select (SLCT)

 

 

section of the Configuration mode. The pulldown limit can be modified, if

 

 

desired, to any rate from 0.2° F to 2° F (0.1° to 1° C)/minute.

 

 

 

06

TIMED OVERRIDE IN EFFECT

Timed override is in effect. This is a 1 to 4 hour temporary override of the

 

 

programmed schedule, forcing unit to Occupied mode. Override can be

 

 

implemented with unit under Local (Enable) or CCN control. Override

 

 

expires after each use.

07

LOW COOLER SUCTION TEMP A

Circuit A capacity may be limited due to operation of this mode. Control will

 

 

attempt to correct this situation for up to 10 minutes before shutting the cir-

 

 

cuit down. The control may decrease capacity when attempting to correct

 

 

this problem. See Alarms and Alerts section for more information.

 

 

 

08

LOW COOLER SUCTION TEMP B

Circuit B capacity may be limited due to operation of this mode. Control will

 

 

attempt to correct this situation for up to10 minutes before shutting the cir-

 

 

cuit down. The control may decrease capacity when attempting to correct

 

 

this problem. See Alarms and Alerts section for more information.

 

 

 

09

SLOW CHANGE OVERRIDE

Slow change override is in effect. The leaving fluid temperature is close to

 

 

and moving towards the control point.

10

MINIMUM OFF TIME ACTIVE

Chiller is being held off by Minutes Off Time (DELY) found under Options 2

 

 

(OPT2) section of Configuration mode.

11

LOW SUCTION SUPERHEAT A

Circuit A capacity may be limited due to operation of this mode. Control will

 

 

attempt to correct this situation for up to 5 minutes before shutting the cir-

 

 

cuit down. See Alarms and Alerts section for more information.

12

LOW SUCTION SUPERHEAT B

Circuit B capacity may be limited due to operation of this mode. Control will

 

 

attempt to correct this situation for up to 5 minutes before shutting the cir-

 

 

cuit down. See Alarms and Alerts section for more information.

13

DUAL SET POINT

Dual set point mode is in effect. Chiller controls to CSP.1 during occupied

 

 

periods and CSP.2 during unoccupied periods. Both CSP.1 and CSP.2 are

 

 

located under COOL in the Set Point mode.

14

TEMPERATURE RESET

Temperature reset is in effect. In this mode, chiller is using temperature

 

 

reset to adjust leaving fluid set point upward and is currently controlling to

 

 

the modified set point. The set point can be modified based on return fluid,

 

 

outdoor-air-temperature, space temperature, or 4 to 20 mA signal.

 

 

 

15

DEMAND LIMIT IN EFFECT

Demand limit is in effect. This indicates that the capacity of the chiller

 

 

is being limited by demand limit control option. Because of this limitation,

 

 

the chiller may not be able to produce the desired leaving fluid temperature.

 

 

Demand limit can be controlled by switch inputs or a 4 to 20 mA signal.

 

 

 

16

COOLER FREEZE PROTECTION

Cooler fluid temperatures are approaching the Freeze point (see Alarms

 

 

and Alerts section for definition). The chiller will be shut down when either

 

 

fluid temperature falls below the Freeze point.

 

 

 

17

LO TMP COOL/HI TMP HEAT

Chiller is in Cooling mode and the rate of change of the leaving fluid is neg-

 

 

ative and decreasing faster than -0.5° F per minute. Error between leaving

 

 

fluid and control point exceeds fixed amount. Control will automatically

 

 

unload the chiller if necessary.

18

HI TMP COOL/LO TMP HEAT

Chiller is in Cooling mode and the rate of change of the leaving fluid is positive

 

 

and increasing. Error between leaving fluid and control point exceeds fixed

 

 

amount. Control will automatically load the chiller if necessary to better match

 

 

the increasing load.

 

 

 

19

MAKING ICE

Chiller is in an unoccupied mode and is using Ice Set Point 3 (CSP.3) to make

 

 

ice. The ice done input to the Energy Management Module (EMM) is open.

20

STORING ICE

Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2

 

 

(CSP.2). The ice done input to the Energy Management Module (EMM) is

 

 

closed.

21

HIGH SCT CIRCUIT A

Chiller is in a cooling mode and the Saturated Condensing temperature read

 

 

by sensor T3 is greater than 140 F (60 C). No additional stages of capacity

 

 

will be added. Chiller may be unloaded if SCT continues to rise to avoid high-

 

 

pressure switch trips by reducing condensing temperature.

 

 

 

22

HIGH SCT CIRCUIT B

Chiller is in a cooling mode and the Saturated Condensing temperature read

 

 

by sensor T4 is greater than 140 F (60 C). No additional stages of capacity

 

 

will be added. Chiller may be unloaded if SCT continues to rise to avoid high-

 

 

pressure switch trips by reducing condensing temperature.

42

Page 42
Image 42
Carrier Air Conditioner specifications Operating Modes, Mode no Item Expansion Description

Air Conditioner specifications

Carrier Air Conditioners have long been synonymous with reliability and innovation in climate control. Founded by Willis Carrier, the inventor of modern air conditioning, the brand has continuously set industry standards through state-of-the-art technologies and features designed to enhance indoor comfort.

One of the standout features of Carrier air conditioners is their energy efficiency. Many models are equipped with advanced inverter technology, allowing the compressor to adjust its speed based on the cooling demand. This results in decreased energy consumption, which not only reduces utility bills but also lessens the environmental impact. Recognizing the importance of sustainable practices, Carrier has integrated eco-friendly refrigerants into their systems, further promoting energy-efficient operations.

Carrier also emphasizes user comfort through its variable speed systems. These systems maintain consistent temperatures while minimizing temperature fluctuations, ensuring an even distribution of cool air throughout the home. Additionally, many Carrier models come with advanced air filtration systems, designed to capture allergens, dust, and other particulates, thereby improving indoor air quality.

The smart technology featured in Carrier air conditioners plays a key role in modern convenience. Many units are compatible with smart home systems, allowing users to control settings remotely via smartphones or voice-activated devices. With features like programmable thermostats, users can easily set cooling schedules to match their lifestyle, ensuring comfort while maximizing energy savings.

Durability and noise reduction are also central to the Carrier brand. Many models are designed with sound-dampening features, making them some of the quietest units on the market. This is particularly advantageous for residential use, where noise can disrupt daily activities and sleep.

In terms of design, Carrier air conditioners come in various styles and capacities to suit a wide range of spaces, from compact apartment units to large central systems for sprawling homes. Their extensive warranty and service offerings further reinforce Carrier’s commitment to customer satisfaction.

In conclusion, Carrier air conditioners represent a perfect blend of cutting-edge technology, energy efficiency, and user comfort. Their emphasis on sustainability and smart features positions them as a leading choice for homeowners seeking reliable and innovative climate control solutions. Whether for cooling a small room or an entire house, Carrier remains a trusted name in air conditioning.