York TLHA18-30OSAAAD Installation Manual page 18

E W
M
12000 tu/h
12000 tu/h
21000 tu/h
NOTE
The supply voltage must be consistent with the rate voltage of the air conditioner.
D
1. Condition to start defrosting: Units will switch to defrosting
mode when either of the following conditions is met.
a. Unit has been running under T3 0
o
and T3 3 C for 3 minutes.
Starting efrosting Mode under condition a.
T3 (°C)
2
1
0 5 10 15 20 25 30 35 40 45 50
0
1
2
3
4
40 min
5
ENGLISH
P S
220 240 50 z
or
220 230 0 z
220 240 50 z
or
220 230 0 z
A
o C for 40 minutes
Time
Elapsed
(min)
3 min
eating mode efrosting mode
I R A
S
10A /15A
1 A
32A/25A
b. Unit has been running at high temperature protection
mode for 90 minutes. (
mode: when coil temperature of indoor unit reaches
55°C, outdoor unit will turn o external unit fan but
still keep compressor running).
2. Condition to stop defrosting: Units will switch back to
heating mode when either of the following conditions is
met.
a. Unit has been running at defrosting mode for 10
minutes.
b. T3 20 o C
R T3 is coil temperature of outdoor units.
igh temperature protection