Carrier GTR040-420 Spezifikationen PDF herunterladen (Seite 53)

6. When the test has been completed, carefully reassemble

expansion valve. Apply a small amount of O-ring grease

to the housing seal O-ring before installing the motor can-

ister. Be careful not to damage the O-ring. Tighten the

motor nut to 15 to 25 lb-ft (20 to 34 N-m). Evacuate the

low side of the open refrigerant circuit. Open compressor

service valves and close compressor circuit breakers.

Open liquid line service valve. Check for any refrigerant

leaks. Turn the ENABLE/OFF/REMOTE switch back to

ENABLE or REMOTE and allow the unit to operate.

Verify proper unit operation.

NOTE: The EXV orifice is a screw-in type and may be

removed for inspection and cleaning. Once the motor canister

is removed the orifice can be removed by using the orifice

removal tool (part no. TS429). A slot has been cut in the top of

the orifice to facilitate removal. Turn orifice counterclockwise

to remove. A large screwdriver may also be used.

When cleaning or reinstalling orifice assembly be careful

not to damage orifice assembly seals. The bottom seal acts as a

liquid shut-off, replacing a liquid line solenoid valve. If the bot-

tom seal should become damaged it can be replaced. Remove

the orifice. Remove the old seal. Using the orifice as a guide,

add a small amount of O-ring grease, to the underside of the or-

ifice. Be careful not to plug the vent holes. Carefully set the

seal with the O-ring into the orifice. The O-ring grease will

hold the seal in place. If the O-ring grease is not used, the seal

O-ring will twist and bind when the orifice is screwed into the

EXV base. Install the orifice and seal assembly. Remove the

orifice to verify that the seal is properly positioned. Clean any

O-ring grease from the bottom of the orifice. Reinstall the ori-

fice and tighten to 100 in.-lb (11 N-m). Apply a small amount

of O-ring grease to the housing seal O-ring before installing the

motor canister. Reinstall the motor canister assembly. Tighten

the motor nut to 15 to 25 ft-lb (20 to 34 N-m).

Alarms and Alerts —

These are warnings of abnormal

or fault conditions, and may cause either one circuit or the

whole unit to shut down. They are assigned code numbers as

described in Table 31.

The alarm/alert indicator light is illuminated when any

alarm or alert condition is present. To reset the unit, switch the

ENABLE-OFF-REMOTE CONTACT switch from ENABLE

to OFF and back to ENABLE within 5 seconds. Indicator light

will be turned off when switched correctly. Do not reset the

chiller at random without first investigating and correcting the

cause(s) of the failure.

Automatic alarms will reset without operator intervention if

the condition corrects itself. The following method must be

used to reset manual alarms:

Before resetting any alarm, first determine the cause of the

alarm and correct it. Enter the Alarms mode indicated by the

LED on the side of the Scrolling Marquee Display. Press

and until the sub-menu item RCRN “RESET

ALL CURRENT ALARMS” is displayed. Press .

The control will prompt the user for a password, by displaying

PASS and WORD. Press to display the default pass-

word, 1111. Press for each character. If the password

has been changed, use the arrow keys to change each individu-

al character. Toggle the display to “YES” and press .

The alarms will be reset.

ENTER

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 103 104

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