28
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:
Confirm that voltage is AC
220--240
10%. If voltage is not in this range, the unit may
not operate normally.
Summary of Contents for 38GVM Series
Page 14: ...14 WIRING DIAGRAMS A13093 Fig 12 38GVM 18k Wiring Diagram...
Page 15: ...15 WIRING DIAGRAMS CONTINUED A13094 Fig 13 38GVM 24k Wiring Diagram...
Page 16: ...16 WIRING DIAGRAMS CONTINUED A13095 Fig 14 38GVM 30k Wiring Diagram...
Page 17: ...17 WIRING DIAGRAMS CONTINUED A13096 Fig 15 38GVM 36k Wiring Diagram...
Page 18: ...18 WIRING DIAGRAMS CONTINUED A13097 Fig 16 38GVM 42k Wiring Diagram...