GMC 1976 ZEO 6083 Maintenance Manual page 745

24E- 6 ROOF MOUNTED AIR CONDITIONER
WARNING : HANDS CAN BE PAINFULLY IN-
JURED IN EVAPORATOR
FAN, BLOWER
WHEELS, AND ON EVAPORATOR COIL FINS .
WARNING : WHEN FLUSHING OR PURGING A
CONTAMINATED SYSTEM, CAUSED BY A
COMPRESSOR MOTOR BURNOUT, PROTECT
EYES AND SKIN FROM CONTACT WITH ACID
SATURATED REFRIGERANT OR OIL MIST .
WARNING : IF REFRIGERANT SHOULD COME
IN CONTACT WITH THE EYES :
WARNING : 1 . DO NOT RUB THE EYES. SPLASH
THE EYES WITH COLD WATER GRADUALLY
TO GET THE TEMPERATURE ABOVE THE
FREEZING POINT .
MAY BE FATAL .
ELECTRICAL DIAGNOSIS
COMPRESSOR FAILS TO START
Figure 10-Voltage to Compressor Check
WARNING : 2 . APPLY A PROTECTIVE FILM OF
AN ANTISEPTIC OIL OVER THE EYEBALL TO
REDUCE THE POSSIBILITY OF INFECTION .
WARNING : 3. CONSULT A DOCTOR OR AN EYE
SPECIALIST IMMEDIATELY .
WARNING : SHOULD LIQUID REFRIGERANT
COME IN CONTACT WITH THE SKIN, THE IN-
JURY SHOULD BE TREATED THE SAME AS
THOUGH THE SKIN HAD BEEN FROSTBITTEN
OR FROZEN .
WARNING : KEEP OUT OF REACH OF CHIL-
DREN . INTENTIONALLY INHALING VAPORS TO
PRODUCE INTOXICATION IS HARMFUL AND
WARNING :
THIS IS A 120-VOLT SYSTEM .
NALS OF A CAPACITOR WITHOUT DISCHARG-
WHERE POSSIBLE, TURN POWER OFF AND
ING IT FIRST TO AVOID POSSIBLE PERSONAL
USE CONTINUITY CHECKS IN PLACE OF
INJURY .
POWER CHECKS . DON'T TOUCH THE TERMI-
Problem Remedy
1 . Compressor siezed up .
1 . Add an extra start capacitor to the compressor
start capacitor for a temporary charge boost at
start. Compressor may break loose. Remove at once
if it starts . If allowed to run with extra capaci-
tor attached, it will burn up .
2 . Voltage to compressor
2 . Check for voltage at compressor with controls
(figure 10) .
on . Connect negative test probe to the M or R
common wire terminal, and positive lead to over-
load or O terminal . There should be a reading of
110 to 120 volts to the overload, and through the
overload to the compressor O terminal .