Quinny QSD 65040-AB User Manual

Section IX - Troubleshooting

Probable Causes:

Corrective Action:

70

Quincy Compressor

®

- QSD™

Failure to Start:

P

OWER

NOT

TURNED

“ON”

B

LOWN

CONTROL

CIRCUIT

FUSE

F

AULTY

START

SWITCH

L

OOSE

WIRE

CONNECTIONS

P

OWER

FAILURE

F

AULTY

TRANSFORMER

L

OW

VOLTAGE

S

AFETY

CIRCUIT

SHUTDOWN

RESULTING

FROM

HIGH

DISCHARGE

AIR

TEMPERATURE

F

AULTY

HIGH

AIR

TEMPERATURE

SWITCH

T

HERMAL

MOTOR

OVERLOAD

RELAYS

TRIPPING

F

AULTY

CONTROL

RELAY

(

WATER

-

COOLED

ONLY

)

F

AULTY

COOLANT

SHUT

-

OFF

VALVE

(

COOLANT

FLOW

SWITCH

CONTACTS

ARE

OPEN

)

S

ETUP

MEMORY

FAILURE

S

ETUP

D

ATA

N

OT

I

NITIALIZED

T

URN

THE

POWER

ON

BY

CLOSING

THE

MAIN

DISCONNECT

SWITCH

OR

CIRCUIT

BREAKER

.

R

EPLACE

FUSE

. F

IND

AND

CORRECT

CAUSE

.

C

HECK

FOR

SHORTED

OUT

LIFT

VALVE

SOLENOID

.

C

HECK

THE

SWITCH

FOR

MALFUNCTION

OR

LOOSE

CONNECTIONS

.

C

HECK

ALL

WIRING

TERMINALS

FOR

CONTACT

AND

TIGHTNESS

.

C

HECK

POWER

SUPPLY

AND

TRANSFORMER

FUSES

.

C

HECK

POWER

SUPPLY

,

POWER

SUPPLY

CABLES

AND

RIBBON

CABLE

GOING

TO

DISPLAY

BOARD

.

C

HECK

SECONDARY

VOLTAGE

ON

TRANSFORMER

.

C

HECK

THE

VOLTAGE

AT

YOUR

ENTRANCE

METER

. C

OMPARE

THAT

READING

TO

A

READING

TAKEN

AT

THE

MOTOR

TERMINALS

.

U

SE

THESE

TWO

READINGS

AS

A

BASIS

FOR

LOCATING

THE

SOURCE

OF

LOW

VOLTAGE

.

C

ORRECT

THE

SITUATION

IN

ACCORDANCE

WITH

THE

INSTRUCTION

IN

THE

H

IGH

D

ISCHARGE

A

IR

T

EMPERATURE

SECTION

OF

THIS

TROUBLESHOOTING

GUIDE

. R

ESTART

THE

COMPRESSOR

.

C

HECK

HAT

SWITCH

. C

ONTACT

AN

AUTHORIZED

Q

UINCY

SERVICE

TECHNICIAN

FOR

REPAIRS

.

D

ETERMINE

AND

CORRECT

THE

CAUSE

OF

THE

MOTOR

OVERLOADED

CONDITION

. R

ESET

OVERLOAD

RELAY

.

R

EPLACE

RELAY

.

E

NSURE

ADEQUATE

WATER

SUPPLY

PRESSURE

AND

FLOW

IS

AVAILABLE

AND

SUPPLY

VALVE

IS

OPEN

. V

ERIFY

THERE

IS

NOT

EXCESSIVE

BACKPRESSURE

ON

THE

DRAIN

SIDE

OF

THE

WATER

SYSTEM

. R

EPLACE

FAULTY

WATER

FLOW

SWITCH

.

T

URN

POWER

OFF

AND

THEN

BACK

ON

.

C

HECK

POWER

CABLE

AND

CONNECTION

BETWEEN

DC

POWER

SUPPLY

AND

MICROPROCESSOR

.

C

ONTACT

AN

AUTHORIZED

Q

UINCY

SERVICE

TECHNICIAN

TO

CHECK

FOR

MICROPROCESSOR

FAILURE

AND

CHECK

FOR

IMPROPER

VOLTAGE

FROM

THE

DC

POWER

SUPPLY

.

I

NITIALIZE

SETUP

DATA

AS

DESCRIBED

ON

PAGE

37 .