ENGLISH
Code
number
Category
Abnormality
Cause
07
Cycle
Decrease in discharge gas superheat
Excessive refrigerant charge, failure of thermistor, incorrect wiring, incorrect
piping connection, expansion valve locking at opened position (disconnect
connector)
08
Excessively high discharge gas
temperature at the top of compressor
Insufficient refrigerant charge, pipe clogging, failure of thermistor, incorrect
wiring, incorrect piping connection, expansion valve locking at closed
position (disconnect connector)
09
Fan motor
Activation of protection device for
outdoor fan
Fan motor overheat, locking
0A
Transmission
Abnormal transmission between
outdoor and indoor unit
Incorrect wiring, broken cable, loose terminals
0b
Outdoor unit
Incorrect outdoor unit address setting
Duplication of address setting for outdoor units (sub units) in same
refrigerant cycle number
0C
Main unit of the outdoor unit incorrectly
set
Two (or more) outdoor units set as “Main Unit” exist in same refrigerant cycle
number
11
Sensor on
indoor unit
Abnormality of inlet air thermistor
Incorrect wiring, disconnecting wiring, breaking wire, short circuit
12
Abnormality of outlet air thermistor
13
Abnormality of freeze protection
thermistor
14
Abnormality of gas piping thermistor
15
Abnormality of outdoor air thermistor
(EconoFresh)
16
Abnormality of remote sensor (DOAS)
17
Abnormality of thermistor built-in
remote controller (DOAS)
18
Indoor fan
motor
Abnormality of indoor fan system
Abnormality of indoor fan motor (Step-Out), indoor fan controller failure
19
Activation of protection device for
indoor fan
Fan motor overheat, lockup
1A
Indoor fan
controller
Abnormality of fan controller fin
temperature
Abnormality of fin thermistor or fan controller, heat exchanger clogging,
abnormality of fan motor
1b
Activation of overcurrent protection
Abnormality of fan motor
1C
Problem with current sensor
Abnormality of fan controller current sensor
1d
Activation fan controller protection
Driver IC error signal detection, instantaneous overcurrent
1E
Abnormality of indoor fan controller
voltage
Indoor voltage decrease, insufficient capacity of power supply wiring
OTHER INDICATIONS
PMML0496 rev.1 - 12/2020
73