Allied 2HP14 설치/시작 지침/주택 소유자 정보 매뉴얼 - 페이지 8

{카테고리_이름} Allied 2HP14에 대한 설치/시작 지침/주택 소유자 정보 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Allied 2HP14 14 페이지. Split system heat pump

페이지 인쇄

intervals.

If the defrost therm ostat is closed when the

selected com pressor run tim e interval ends (call for

defrost), the defrost relay is energized and defrost begins.

The factory setting is 60 m inutes.

accum ulation is easily cleared, the optim um efficiency

setting is 90 m inutes.

Outdoor Unit Defrost Control Board

Defrost Control Timing Pins

Each

tim ing

selection

accum ulated com pressor run tim e period for one defrost

cycle. This tim e period m ust occur before a defrost cycle

is initiated. The defrost interval can be adjusted to 30

(/T1), 60 (T2), or 90 (T3) m inutes. The defrost tim ing

jum per is factory-installed to provided a 90-m inute defrost

interval. If the tim ing selector jum per is not in place the

control defaults to a 90-m inute defrost interval.

m axim um defrost period is 14 m inutes and cannot be

adjusted.

A TEST option is provided for troubleshooting.

TEST mode may be started any time the unit is in the

heating mode and the defrost thermostat is closed or

jumpered. If the jum per is in the TEST position at power-

up, the control will ignore the test pins. W hen the jum per

is placed across the TEST pins for 2 seconds, the control

will enter the defrost m ode.

before an additional 5 second period has elapsed ( 7

seconds total), the unit will rem ain in defrost m ode until the

defrost therm ostat opens or 14 m inutes have passed. If

the jum per is not rem oved until after the additional 5

second period has elapsed, the defrost will term inate and

the test option will not function again until the jum per is

rem oved and re-applied.

Com pressor Delay

The defrost board has a field-selectable function to

reduce occasional sounds that m ay occur while the unit is

cycling in and out of the defrost m ode. T he com pressor

will be cycled "off" for 30 seconds going in and out of the

506162-02

However, if frost

provides

different

The

If the jum per is rem oved

defrost m ode when the com pressor delay jum per is

rem oved.

NOTE: The 30 second "off" cycle is not functional when

jum pering the TEST pins.

Time Delay

The tim ed-off delay is 5 m inutes long. The delay help to

protect the com pressor from short-cycling in case the

power to the unit is interrupted or a pressure switch opens.

The delay is bypassed by placing the tim er select jum per

across the TEST pins for 0.5 seconds.

Pressure Sw itch Circuit

The defrost control incorporates 2 pressure switch

circuits. The optional high pressure switch connects to the

boards HI PS term inals. The low pressure switch is factory

installed.

During a single dem and cycle, the defrost control will lock

out the unit after the fifth tim e that the circuit is interrupted

by any pressure switch wired to the control board.

addition, the diagnostic LEDs will indicate a locked-out

pressure switch after the fifth occurrence of an open

pressure switch.

power to the board is interrupted, then re-established or

until the jum per is applied to the T EST pins for 0.5

seconds.

NOTE: The defrost control board ignores input from the

low-pressure switch term inals as follows:

During the TEST m ode,

During the defrost cycle,

During the 90 second start-up period,

and for the first 90 seconds each tim e the reversing

valve switches heat/cool m odes. If the TEST pins

are jumpered and the 5 minute delay is being by-

passed, the LO PS terminal signal is not ignored

during the 90 second start-up period.

Diagnostic LEDS

The defrost board uses 2 LEDs for diagnostics. The

LEDs flash a specific sequence according to the condition.

Defrost Control board Diagnostic LED

Mode

No power to control

Normal operation/

power to control

Anti-short cycle

lockout

Low pressure switch

fault (Optional)

Low pressure switch

lockout (Optional)

High pressure switch

fault (Optional)

High pressure Switch

lockout (Optional)

Issue 0847

The unit will rem ain locked out until

Green LED (DS2)

Red LED (DS1)

OFF

Simultaneous Slow FLASH

Alternating Slow FLASH

OFF

Slow FLASH

OFF

Slow FLASH

OFF

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