91
7-4.
Outdoor unit
control
Jumper switching O: Short circuit ×: Open
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 (See page 86))
• PMV control interval will be shorter than normal.
• Operation frequency will be fixed.
*1. When TD ≥ 50°C, Advance defrosting will be skipped.
Item Operation flow and applicable data, etc.
J805 J806 [d]
O O 150 min (Factory default)
O × 90 min
× O 60 min
× × 30 min
801, 1101
Advance defrosting (*1) Defrosting operation
Compressor
OFF
40 Hz
Outdoor FAN
OFF
ON
4-way valve
OFF
ON
Outdoor PMV
380 pulse
400 pulse
0 pulse
Dotted line shows an operating image.
40s30s20s10s0s40s30s20s10s0s
To Next Page
Loading...
