Self-Diagnosis Function Table (Outdoor Unit - Panasonic U-16GE2E5 Test Run Manual

7. Self-diagnosis function table (outdoor unit)

System A (activation of engine system operation devices)
Outdoor
unit control
board
display
 Operation is normal
 Engine oil pressure trouble
 Engine oil trouble
Engine speed too high

Engine speed too low

Ignition power trouble

Engine start failure

Fuel gas valve failure

Engine stall

Exhaust gas temp. high

Engine oil level trouble

 Engine oil pressure switch failure
 Start power output short circuit
 Starter locked
System E (communications system trouble)
Outdoor
unit control
board
display
 Remote controller receiving failure
Remote controller sending failure

Indoor unit failed to receive signal from remote

controller (central)
Indoor unit failed to receive signal from outdoor

unit
Indoor unit failed to send signal to outdoor unit

Outdoor unit failed to receive signal from indoor

unit
Outdoor unit failed to send signal to indoor unit

Duplicate indoor unit address

Multiple units set as master remote controller

Communications failure with DC fan driver

Indoor board failed to receive signal from signal

output board
System F (trouble with sensors, memory, or other parts)
Outdoor
unit control
board
display
Indoor heat exchange inlet temp. sensor trouble

Indoor heat exchanger intermediate temp.
sensor trouble (Water heat exchanger freezing

sensor trouble)
Indoor heat exchanger outlet temp. sensor

trouble
Compressor outlet temp. sensor trouble

Outdoor heat exchanger inlet temp. sensor

trouble
Outdoor heat exchanger outlet temp. sensor

trouble
Outdoor temp. sensor trouble

Indoor unit intake air temp. sensor trouble

Indoor unit discharge air temp. sensor trouble

Compressor inlet temp. sensor trouble

Cooling water temp. sensor trouble

Contents
Contents
Contents
Outdoor
unit control
board
display
 CT trouble (starter current detection failure)
 Cooling water temp. low
 Cooling water temp. high
Cooling water level trouble

Cooling water pump overload

Crankshaft angle sensor trouble

Camshaft angle sensor trouble

Clutch trouble (handled as warning)

Misfi re

Catalyst temp. trouble

Generator trouble

 Converter trouble
 Fuel gas pressure low
Outdoor
unit control
board
display
Automatic address setting is in progress; auto-

matic address setting start is prohibited
Indoor unit failed to send signal to remote con-

troller
Automatic address setting warning (too few

units)
Automatic address setting warning (too many

units)
Group control cable communications failure

Automatic address indoor unit does not exist

PCB (Control Board) trouble

Thermistor trouble

Communications failure between outdoor units

Discrepancy in the number of outdoor units

Unit internal communications failure

Outdoor
unit control
board
display
Compressor inlet/outlet pressure sensor trouble

 Optical sensor trouble
Exhaust gas temp. sensor trouble

Clutch coil temp. sensor trouble

Clutch coil 2 temp. sensor trouble

Coolant heat exchanger for heating inlet

temperature sensor failure
Coolant heat exchanger for heating outlet

temperature sensor failure
Indoor nonvolatile memory (EEPROM) trouble

Clock function (RTC) trouble

Outdoor nonvolatile memory (EEPROM) trouble

II - 46
Contents
Contents
Contents