Toshiba HWS-803XWHM3-E Service Manual page 117

Outdoor LED
Check code
indication
[P19]
<Indication 1> <Indication 2>
(No specific description indicates outdoor unit parts.)
[4-way valve invert failure]
4-way valve operates normally.
(Check piping temperature at the
time of cooling/heating operation)
Temperature sensor check
TE sensor CN601
TS sensor CN600
Hydro TWO sensor
If defective, repair or replace it
4-way valve coil resistance
is 1.3 to 1.6 k .
Outdoor control board operation
check (See below)
4-way valve check
If defective, replace it
Outdoor control board operation check direction (Self-hold valve) = 803 to 1403H-E only
1) With the dip switch SW804 set as in the table below, pressing SW801 for approx. 1 second
can check the operation of switching to cooling cycle or to heating cycle.
• The board are energized for 10 seconds.
• Take more than a minute for the next check because the parts (coil, resistance R700)
generate large heat.(This does not apply when no coil is connected.)
2) After the check, set all the SW804 dip switches to OFF.
Switching to cooling cycle
SW804 SW801 CN701
Press
Note: Check with a tester
With an analog tester: If a tester shows 180DCV or higher, the board is good.
With digital tester:
1103 to 1603H8(R)-E
The 4-way valve coil of 1103H8(R)-1603H8(R)-E is not self-hold type.
116
Check and Action procedure
Switching to heating cycle
SW804 SW801
Press
180DCV or higher
Although values shown has some range, if its maximum value is
180DCV or higher, the board is good.
Replace 4-way coil
Check outdoor board
If defective, replace it
CN701
180DCV or higher