Trane VUVE Vertical Classroom Instalační manuál stáhnout pdf (Strana 103)

Diagnostics

UV-SVN03F-EN 103

two seconds.The green LED will begin to blink, indicating

the controller is in test mode.

Troubleshooting (UC400)

Table 45 through Table 50, p. 105 provide troubleshooting

information if encountering operational problems with the

UC400 controller.

Table 44. Test sequence for 1-heat/1-cool configurations

(Tracer ZN520)

Steps

Fan

BOP1-3

Cool

Output

BOP4

(a)

(a) At the beginning of the Fan High step, the controller attempts to clear

all diagnostics.

Heat

Output

BOP5

Damper

BOP6

1. Off Off Off Off Closed

2. Fan High High Off Off Closed

3. F a n M e d i u m M e d i u m O f f O f f Clo s e d

4. Fan Low Low Off Off Closed

5. Cool High On Off Closed

6. Heat High Off On Closed

7. Fresh Air Damper

(b)

(b)The fresh air damper (BOP6) only energizes during this step if binary

output 6 has been configured as a fresh air damper.

High Off Off Open

8. Exit

(c)

step.This initiates a reset and attempts to return the controller to normal

operation.

Note: For all 1-heat/1-cool applications including 2-pipe changeover, BOP4

energizes in the cooling test stage and BOP5 energizes in the heat

test stage.This occurs even though during normal 2-pipe changeover

operation BOP4 controls the unit valve for both cooling and heating.

Table 45. Fan does not energize (UC400)

Probable

Cause Explanation

Unit wiring The wiring between the controller outputs and the fan

relays and contacts must be present and correct for normal

fan operation. Refer to applicable wiring diagram.

Failed end

device

The fan motor and relay must be checked to ensure proper

operation.

Normal

operation

The fan will turn OFF when:

• The controller receives a communicated off signal

• The fan-speed switch is set to OFF if no communicated

value is present

• Specific diagnostics are generated

• The default fan speed is set to OFF and the fan is

operating in the Auto mode.

If the controller is in unoccupied mode, the fan cycles

between OFF and the highest fan speed.

No power to

the controller

If the controller does not have power, the unit fan does not

operate. For the controller to operate normally, it must

have an input voltage of 24 Vac. If the Marquee/Power LED

is OFF continuously, the controller does not have sufficient

power or has failed.

Diagnostic

present

Several diagnostics affect fan operation. For detailed

information about these diagnostics, refer to Table 34,

p. 95.

Unit

configuration

The controller must be properly configured based on the

actual installed end devices and application. If the unit

configuration does not match the actual end device, the

fans may not work correctly.

Random start

observed

After power-up, the controller always observes a random

start from 5 to 30 seconds. The controller remains OFF

until the random start time expires.

Cycling fan

operation/

continuous

The controller continuously operates the fan when in the

occupied, occupied standby, or occupied bypass mode.

When the controller is in the unoccupied mode, the fan is

cycled between high speed and OFF with capacity.

Unoccupied

operation

Even if the controller is configured for continuous fan

operation, the fan normally cycles with capacity during

unoccupied mode. While unoccupied, the fan cycles ON or

OFF with heating/cooling to provide varying amounts of

heating or cooling to the space.

Fan mode off If a local fan mode switch determines the fan operation, the

OFF position controls the fan to off.

Requested

mode off

The user can communicate a desired operating mode (such

as OFF, heat, and cool) to the controller. If OFF is

communicated to the controller, the unit controls the fan to

off. There is no heating or cooling.

Table 46. Valves remain closed (UC400)

Probable

Cause Explanation

Unit wiring The wiring between the controller outputs and the valve(s)

must be present and correct for normal valve operation.

Refer to applicable wiring diagram.

Failed end

device

The valves must be checked to ensure proper operation.

No power to

the controller

If the controller does not have power, the unit valve(s) will

not operate. For the controller to operate normally, apply

an input voltage of 24 Vac. If the Marquee/Power LED is

OFF continuously, the controller does not have sufficient

power or has failed.

Diagnostic

present

Several diagnostics affect valve operation. For detailed

information about these diagnostics, refer to Table 34,

p. 95.

Normal

operation

The controller opens and closes the valves to meet the unit

capacity requirements.

UV-SVN03_.book Page 103 Thursday, January 24, 2013 5:27 PM

1 2 ... 98 99 100 101 102 103 104 105 106 107 108 109 110 111

Komentáře k této Příručce

Žádné komentáře

Trane VUVE Vertical Classroom Instalační manuál Strana 103

Komentáře k této Příručce

Související produkty a manuály pro Termostaty Trane VUVE Vertical Classroom