Troubleshooting; Warning; Failure To Follow This Warning Could; Electrical Shock Hazard - Carrier 38GVM Series Service Manual

TROUBLESHOOTING

Precautions for Performing Inspections and Repairs
Be cautious during installation and maintenance. Follow all rules
and regulations to avoid electric shock and to prevent injury or
damage.

WARNING

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF position.

There may be more than one disconnect switch. Lock out

and tag switch with a suitable warning label.

Static Maintenance
Static Maintenance is maintenance during de- -energization of the
air conditioner.
For static maintenance, make sure that the unit is de- -energized and
the plug is disconnected.
Dynamic Maintenance
Dynamic maintenance is the maintenance during energization of
the unit.
Before dynamic maintenance, check the electricity and ensure that
there is a good ground. Check if there is electricity on the case and
copper pipe of the air conditioner with a voltage tester.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
A large- -capacity electrolytic capacitor is used in the outdoor
unit controller (inverter). When the power supply is turned
off, charge (charging voltage DC280V to 380V) remains
and takes a long time to discharge.
Do Not open the outdoor unit for 20 minutes after power
has been turned OFF.
Take sufficient care to avoid directly touching any of the circuit
parts without first turning off the power.
At times, such as when the circuit board is to be replaced, place the
circuit board assembly in a vertical position.
Diagnose troubles according to the trouble diagnosis procedure as
described below.
Also refer to the check points in servicing written on the wiring
diagrams attached to the indoor/outdoor units.
No. Trouble Shooting Procedure
1 Confirmation
2 Code displays interpretation of error codes.
3 Basic System Check
Confirmation
:
1. Confirmation of Power Supply: Confirm that the power
breaker operates normally and provides power
2. Confirmation Voltage:
220- -240 10%. If voltage is not in this range, the unit may
not operate normally.
28
Confirm that voltage is AC