Toshiba HWT-602S21SM3W-E(TR) Service Manual page 107

Item
7-4.
Jumper switching
Outdoor unit
control
J805
O
O
5-2) Advance defrost operation
When compressor temperature is low, defrosting preliminary operation will be carried out to carry defrosting smoothly in
effect.
1) Start condition of advance defrosting
• TD < 50ºC and A, B, C or D zone detected.
2) Conditions for changing over from defrosting preliminary operation to defrosting.
• When TD ≥ 50°C is detected during defrosting preliminary operation.
• When thermostat is turned off during defrosting preliminary operation.
• When defrosting preliminary operation is carried out more than 10 minutes.
3) Control details
• Target SH during defrosting preliminary operation will be 6 to 10 K. (refer to 7-4-1)
• PMV control interval will be shorter than normal.
• Operation frequency will be fixed.
801, 1101, 1401
Compressor
Outdoor FAN
4-way valve
Outdoor PMV
*1. When TD ≥ 50°C, Advance defrosting will be skipped.
Operation flow and applicable data, etc.
O: Short circuit ×: Open
J806
O 150 min (Factory default)
×
× O
× ×
40 Hz
OFF
ON
OFF
ON
OFF
400 pulse
380 pulse
0 pulse
[d]
90 min
60 min
30 min
Advance defrosting (*1)
0s 10s 20s 30s 40s
Dotted line shows an operating image.
106
Defrosting operation
0s 10s 20s 30s 40s