Carrier 50RTG specifications Service, Control Current LED Status Alarm Relay Operations

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Table 19 — C Control Current LED Status

and Alarm Relay Operations

LED STATUS

 

DESCRIPTION OF OPERATION

ALARM RELAY

 

 

 

 

Normal Mode

Open

 

On

 

Normal Mode with

Cycle

 

 

 

 

PM Warning

(closed 5 sec.,

 

 

 

 

Open 25 sec.)

 

 

 

 

 

 

Off

 

C Control is non-functional

Open

Slow Flash

 

Fault Retry

Open

 

Fast Flash

 

Lockout

Closed

Slow Flash

 

 

Open

 

Over/Under Voltage Shutdown

(Closed after

 

 

 

 

 

15 minutes)

Flashing Code 1

Test Mode — No fault in memory

Cycling Code 1

Flashing Code 2

Test Mode — HP Fault in memory

Cycling Code 2

Flashing Code 3

Test Mode — LP Fault in memory

Cycling Code 3

Flashing Code 4

Test Mode — FP1 Fault in memory

Cycling Code 4

Flashing Code 5

Test Mode — FP2 Fault in memory

Cycling Code 5

Flashing Code 6

Test Mode — CO Fault in memory

Cycling Code 6

Flashing Code 7

 

Test Mode — Over/Under

Cycling Code 7

 

shutdown in memory

 

 

 

 

 

Flashing Code 8

 

Test Mode — PM in memory

Cycling Code 8

Flashing Code 9

 

Test Mode — Test Mode — FP1/

Cycling Code 9

 

FP2 Swapped Fault in memory

 

 

 

 

 

 

LEGEND

 

 

CO

Condensate Overflow

 

FP

Freeze Protection

 

HP

High Pressure

 

LED — Light-Emitting Diode

 

LP

Low Pressure

 

PM

Performance Monitor

 

NOTES:

1.Slow flash is 1 flash every 2 seconds.

2.Fast flash is 2 flashes every 1 second.

3.EXAMPLE: “Flashing Code 2” is represented by 2 fast flashes followed by a 10-second pause. This sequence will repeat continually until the fault is cleared.

Table 20 — C Control LED Code and

Fault Descriptions

 

LED

FAULT

DESCRIPTION

CODE

 

 

 

1

No fault in memory

There has been no fault since

 

 

 

the last power-down to power-up

 

 

 

sequence

 

2

High-Pressure Switch

HP Open Instantly

 

3

Low-Pressure Switch

LP open for 30 continuous sec-

 

 

 

onds before or during a call

 

 

 

(bypassed for first 60 seconds)

 

4

Freeze Protection Coax

FP1 below Temp limit for 30 con-

 

 

— FP1

tinuous seconds (bypassed for

 

 

 

first 60 seconds of operation)

 

5

Freeze Protection Air Coil

FP2 below Temp limit for 30 con-

 

 

— FP2

tinuous seconds (bypassed for

 

 

 

first 60 seconds of operation)

 

6

Condensate overflow

Sense overflow (grounded) for

 

 

 

30 continuous seconds

 

7

Over/Under Voltage

"R" power supply is <19VAC or

(Autoreset)

Shutdown

>30VAC

 

8

PM Warning

Performance Monitor Warning

 

 

 

has occurred.

 

9

FP1 and FP2 Thermistors

FP1 temperature is higher than

 

 

are Swapped

FP2 in heating/test mode, or FP2

 

 

 

temperature is higher than FP1

 

 

 

in cooling/test mode.

 

LEGEND

 

FP

Freeze Protection

 

HP

High Pressure

 

LED — Light-Emitting Diode

 

LP

Low Pressure

 

PM

Performance Monitor

 

Retry Mode — In Retry mode, the status LED will start to flash slowly to signal that the control is trying to recover from an input fault. The control will stage off the outputs and try to

again satisfy the thermostat used to terminal Y. Once the ther- mostat input calls are satisfied, the control will continue normal operation.

NOTE: If 3 consecutive faults occur without satisfying the thermostat input call to terminal Y, the control will go into lockout mode. The last fault causing the lockout is stored in memory and can be viewed by entering Test mode.

Aquazone™ Deluxe D Control LED Indica- tors — There are 3 LED indicators on the D Control:

STATUS LED — Status LED indicates the current status or mode of the D control. The Status LED light is green.

TEST LED — Test LED will be activated any time the D control is in test mode. The Test LED light is yellow.

FAULT LED — Fault LED light is red. The fault LED will always flash a code representing the last fault in memory. If there is no fault in memory, the fault LED will flash code 1 on and appear as 1 fast flash alternating with a 10-second pause. See Table 21.

SERVICE

Perform the procedures outlined below periodically, as indicated.

IMPORTANT: When a compressor is removed from this unit, system refrigerant circuit oil will remain in the com- pressor. To avoid leakage of compressor oil, the refrigerant lines of the compressor must be sealed after it is removed.

IMPORTANT: All refrigerant discharged from this unit must be recovered without exception. Technicians must fol- low industry accepted guidelines and all local, state and fed- eral statutes for the recovery and disposal of refrigerants.

IMPORTANT: To avoid the release of refrigerant into the atmosphere, the refrigerant circuit of this unit must only be serviced by technicians which meet local, state and federal proficiency requirements.

IMPORTANT: To prevent injury or death due to electrical shock or contact with moving parts, open unit disconnect switch before servicing unit.

Filters — Filters must be clean for maximum performance. Inspect filters every month under normal operating conditions. replace when necessary.

IMPORTANT: Units should never be operated with- out a filter.

Water Coil — Keep all air out of the water coil. Check open loop systems to be sure the well head is not allowing air to infiltrate the water line. Always keep lines airtight.

Inspect heat exchangers regularly, and clean more frequent- ly if the unit is located in a “dirty” environment. The heat exchanger should be kept full of water at all times. Open loop systems should have an inverted P trap placed in the discharge line to keep water in the heat exchanger during off cycles. Closed loop systems must have a minimum of 15 PSI during the summer and 40 PSI during the winter.

Check P trap frequently for proper operation.

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Contents Contents Safety ConsiderationsInstallation GeneralPhysical Data Aquazone 50RTG03-20 Units Unit 50RTGRefrigerant to AIR Heat Exchanger Number of Circuits Blower Data50RTG Dimensional Data Return Air Supply 50RTG Curb Installation Condensate DrainElectrical Wiring Water Quality Guidelines50RTG03-07 with Economizer and Complete C Controller 50RTG Electrical Data 50RTG03 Blower Performance50RTG04 Blower Performance 50RTG05 Blower Performance50RTG07 Blower Performance 50RTG08 Blower Performance50RTG10 Blower Performance 50RTG12 Blower Performance50RTG15 Blower Performance 50RTG20 Blower PerformanceLow Voltage Wiring PRE-START-UPField Selectable Inputs Control Jumper Settings See FigControl Jumper Settings Control Accessory Relay Configurations DIP Switch Block S2 Accessory 1 Relay OptionsDIP Switch Block S2 Accessory 2 Relay Options START-UPUnit Start-Up Cooling Mode Unit Start-Up Heating ModeOperating Limits 50RTG Units AIR Limits Cooling Heating50RTG Coaxial Water Pressure Drop Approximate Fluid Volume gal Per 100 Ft of PipeAntifreeze Percentages by Volume Operation Units with Aquazone Complete C ControlUnits with Aquazone Deluxe D Control System TestControl LED Code Fault Descriptions ServiceControl Current LED Status Alarm Relay Operations ESD Alarm RelayDescription Status LED Test LED Air Coil Fan Motor Removal TroubleshootingRefrigerant Charging FP1 and FP2 Thermistor Location Troubleshooting Fault Heating Cooling Possible Cause SolutionUnit Does Not Operate Copyright 2002 Carrier Corporation 50RTG START-UP Checklist II. START-UPHeating Cycle Analysis Cooling Cycle Analysis

50RTG specifications

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