Toshiba HWT-602S21SM3W-E(TR) Service Manual page 122

Diagnostic functional operation
Check
code
Operational cause
Short circuit of the compressor driver
element failure
When an abnormal short circuit of IGBT
is detected.
P26
Compressor rotor position failure
The rotor position in the compressor
cannot be detected.
P29
Check code: H04, P04, P29
After the failure is detected, It takes approximately 40 - 50 minutes while the check code is displayed on the remote controller.
Failure mode detected by the remote controller
Check code
Operational cause
No communication between hydro
Not
unit an remote controller
displaying at
• The remote controller wiring is not
all
connected correctly.
(cannot
• The hydro unit has not been turned
operate by
on.
the remote
controller)
No communication between hydro
unit and remote controller
• Disconnection of the crossover
between the remote controller and
E01
the base unit of the Hydro unit
(detected on the remote controller
side).
Failure in the signal transmission
to the hydro unit.
(Detected on the remote controller
E02
side)
Several remote controller base
units
E09
(Detected on the remote controller
side)
Backup Automatic
operation reset
O ×
O ×
Diagnostic functional operation
Status of air to
water heat pump
Stop
Stop
(Automatic reset)
Stop
(Automatic reset)
Stop
(The handset
continues)
121
Determination and action
1. P26 abnormality occurs when
operating with the compressor
wiring disconnected ... Check the
outdoor control board.
2. No abnormality occurs when
operating with the compressor
wiring disconnected ... Compressor
rare short.
1. Even if the connection lead wire of
the compressor is disconnected, it
stops due to an abnormality in the
position detection ... Replace the
outdoor control board.
2. Check the wire wound resistor of the
compressor. Short circuit
... Replace the compressor.
Condition
– Failure in the remote controller power
supply
1. Check the remote controller wiring.
Check the remote controller.
2. Check the hydro unit power supply
wiring.
3. Check the water heat exchange
control board.
Displayed when Failure in the reception of the remote
the abnormality controller
is detected.
1. Check the remote controller
crossover.
2. Check the remote controller.
3. Check the hydro power supply wiring.
4. Check the water heat exchanger
board.
Displayed when Failure in the transmission of the remote
the abnormality controller
is detected.
1. Check the transmitter circuit inside the
remote controller.
... Replace the remote controller.
Displayed when 1.2 Check several base units with the
remote controller
the abnormality
is detected.
... The base unit is only one, and others
are handsets.
Number of
abnormalities Detailed
for item
confirmation
8 134
8 134
Determination and action