Toshiba HWS-P804XWHM3-E1(TR) Service Manual page 72

Item
8-4. 7) Winding heating control
Outdoor unit
1) This control energizes the inactive compressor instead of the case heater to warm the compressor. The purpose is
control
2) After the unit is installed, failure to perform energization for the given time period may cause the compressor to fail.
3) Energization is determined by the TD sensor and TO sensor. If the TO sensor fails, the TE sensor automatically takes
4) If TD is 30 °C or higher, the energization stops.
*Energization
condition
TD
*Energization
condition
TD
Notes
During winding energization, energizing noise may be heard, but this is not abnormal.
8) Short circuit operation prevention control
1) In 11 minutes after the operation start, the compressor may not stop for protection. This status is not abnormal. (The
2) If the operation stops with the remote controller, the operation does not continue.
9) Over current protection control
1) A detection of abnormal current with the over current protection control stops the compressor.
2) Set the abnormality detection counter to 1, and restarts the compressor after 150 seconds.
3) When the stop by over current protection control counts 8 times, error code is displayed and the compressor does
AMP Air Conditioning
Operation flow and applicable data, etc.
to prevent the refrigerant from staying inside the compressor.
Also, when starting an operation long after the power left off, first energize the compressor before starting the
operation in the same way as a trial run.
over the operation. Determine if the TO sensor has failed check the LED's on the outdoor unit PCB.
(Usual)
TO
18 °C
15 °C
30 °C
10 °C
8 °C
(when TO sensor fails)
TE
20 °C
18 °C
30 °C
12 °C
10 °C
operation duration time of the compressor varies depending on a operation status.)
not restart.
(Remote controller error code display: HO1)
Not energized
Intermittently energized
10 mins: ON / 5 mins: OFF
Output "equal to 40W"
Continuously energized
Output "equal to 40W"
Not energized
Intermittently energized
10 mins: ON / 5 mins: OFF
Output "equals to 40W"
Continuously energized
Output "equals to 40W"
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