Service Procedures - Sanyo C4272R Service Manual

Possible cause of malfunction
Ceiling panel connection failure
Indoor protection
Activation of
protective
device
Outdoor protection
Thermistor Thermistor open circuit
• Short circuit (indoor)
fault
Thermistor open circuit
• Short circuit (outdoor)
Fan protective thermostat
Float switch
Discharge temperature trouble
High pressure switch or compressor motor thermal protector is activated.
Open phase detected, AC power trouble
No gas
4-way valve locked
High cooling load
Outdoor fan trouble
Inverter compressor trouble (HIC PCB)
Inverter compressor trouble (MDC)
Simultaneous-operation multi control trouble
Compressor current failure (overload)
Indoor heat exchanger temperature sensor (E1)
Indoor heat exchanger temperature sensor (E2)
Indoor temperature sensor
Discharge temperature (TD)
Outdoor heat exchanger temperature (C1)
Outdoor heat exchanger temperature (C2)
Outdoor air temperature (TO)
Intake temperature (TS)
Indoor EEPROM error
Outdoor EEPROM error
IV-3

4. Service procedures

Wired
Wireless
remote
remote controller
control
receiver display
display
P09
P01
Alternately
P10
P03
P04
P05
P15
P19
P20
Alternately
P22
P26
P29
P31
H01
F01
F02
Alter.
F10
F04
F06
F07
Alter.
F08
F12
F29
Simul.
F31
Simul.
SM831148
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