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Toshiba
P20
High pressure protection operation
When an abnormal stop occurs due to
the high pressure release control.
When the heat exchange temperature
sensor (TL) detects 63°C during the
cooling operation.
When the water outlet sensor (TWO)
detects 60°C during the heating or hot
water supply operation.
O
×
1.Check that the service valve is fully
open.
2.Defect of the pulse motor valve.
3.Check the outdoor fan system
(including clogging).
4.Over-filling of refrigerant.
5.Check the resistance value of the
heat exchange temperature sensor
(TL) and the water outlet
temperature sensor (TWO).
10 97
P22
Outdoor fan system error
When a DC fan rotor position detection
NG, element short circuit, loss of
synchronization, or abnormal motor
current occurs.
O
×
1.Check the lock status of the motor
fan.
2.Check the connection of the fan
motor cable connector.
3.Check the power supply voltage
(AC230 V±23 V).
1-4 98
P26
Short circuit of the compressor driver
element error
When an abnormal short circuit of IGBT
is detected.
O
×
1.P26 abnormality occurs when
operating with the compressor
wiring disconnected … Check the
control board.
2.No abnormality occurs when
operating with the compressor
wiring disconnected … Compressor
rare short.
898
P29
Compressor rotor position error
The rotor position in the compressor
cannot be detected.
O
×
1.Even if the connection lead wire of
the compressor is disconnected, it
stops due to an abnormality in the
position detection … Replace the
inverter control board.
2.Check the wire wound resistor of the
compressor. Short circuit
… Replace the compressor.
898
Check
code
Diagnostic functional operation
Determination and action
Number of
abnormalities
for
confirmation
Detailed
item
Operational cause
Backup
present
Automat
ic reset
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 72 Monday, October 5, 2009 2:09 PM