Toshiba HWS-P805XWHM3-E(TR) Service Manual page 119

Outdoor LED
Check code
indication
[P04] * Any of the following abnormality may occur.
Seeing the LED on the outside board can determine which abnormality occurs.
1.High pressure sensor activated.
2.Power source failure (Vdc)
3.Hi pressure protection operation
4.Case thermostat operation
<Display 1> <Display 2>
<Model A>
<Model B>
(No specific description indicates outdoor unit parts.)
[High pressure SW system error]
Power supply error (Vdc), High pressure protective operation, Case thermostat operation.
Doesn't high pressure switch
operate?
YES
Are parts of
high pressure switch normal?
YES
Is service valve fully opened?
YES
Reset the power supply and
then do a test run according
to the season.
B Cooling operation.
Does cooling outdoor fan
normally operate?
YES
Is there any element
which blocks heat exchanger
of the outdoor unit?
1. Clogging of heat exchanger
2. Short circuit
NO
C
Heating operation
Does the heating outdoor fan
normally operate?
YES
Is there any element which
blocks hydro heat exchanger?
1. Filter clogging
Clogging of heat exchanger
2.
3. Shor t circuit
NO
Clogging by refrigerant
overcharge / Pipe breakage /
Abnormal overload
118
Check and Action procedure
NO
Is circuit wiring normal?
NO
Parts check
Defective → Replace
NO
Open service valve fully
B ← Cooling operation
C ← Heating operation
NO
Is there no fan breakage
or coming-off?
YES
YES
NO
Are connections of
connectors,capacitors
and fan motor normal?
YES
Elimination of
blocking element
Are characteristics
of TC and TCJ sensor
resistance value normal?
Check hydro PC board
→
Defective Replace
NO
Wiring check,
Correct.
YES
.
Check Comp. IPDU PC board
Defective → Replace
NO
Repair defective position.
Connection of connectors,
Fan IPDU, Fan motor, Wiring.
Elimination of
blocking element
Overcharge of refrigerant /
Clogging / Pipe breakage /
Abnormal overload
NO
YES
Repair
defective position.
NO
YES
Replace
TC or TCJ sensor.