Toshiba ESTIA A09-01P - Manual (Page 30)

Quick Reference Guide - Page 30
Alarm Indications
(cont)
A09 Overheat preventive operation malfunction Auto-reset: When operation mode is changed
A11
Release preventive operation malfunction This alarm occurs when the Hydro Unit enters the forced-
stop zone 10 times.
P31
Self-hydro unit is stopped due to alarm of other hydro unit. When alarm occurs in an hydro unit in the
group, other hydro units must also be stopped with refrigerant control.
When alarm E03, L03 or L07 occurs in the header unit in the group, other hydro units must also be
stopped
because they do not know which header unit (remote controller) to follow.
Auto-reset: When the first alarm is reset
Outdoor Alarm indication
Alarm
indication
Main failure part Description
F04
Outdoor unit discharge
temperature sensor TD
defect
When open- or short-circuit of discharge temperature sensor TD is
detected
F06
Outdoor unit temperature
sensor TE or TS defect When open- or short-circuit of heat exchanger temperature sensor
TE or TS is detected
F08
Outdoor unit outside air
temperature sensor TO
defect
When open- or short-circuit of outside air temperature sensor TO is
detected
H01 Compressor breakdown
When min-Hz is reached by current release control or when short-
circuit current (Idc) is detected after direct current excitation
H02 Compressor locked When compressor lock is detected
H03 Current detector defect
When abnormal current is detected in AC-CT or phase loss is
detected
H06 Low-pressure system defect Ps pressure sensor defect or low-pressure protective operation
L29 Other outdoor unit faults
Other outdoor unit faults: 1) Inter-MCU communication error between
IPDU and CDB 2) abnormal GBT heat sink temperature
L31 Phase sequence error, etc.
When phase sequence of 3-phase power supply is incorrect
(thermostat OFF operation continued), etc.
P03
Abnormal outdoor unit
discharge temperature When abnormal temperature is detected by discharge temperature
release control
P04
High-pressure system
defect When high-pressure switch , IOL is activated or when abnormality is
detected by high-pressure release control by TE
P22 Outdoor unit fan defect When over current or lock in outdoor unit fan drive circuit is detected
P26 Inverter Idc operation
When short-circuit protection is activated for compressor driver
devices (G-Tr, IGBT)
P29 Position detection error When compressor motor position detection error is detected