62
The highest speed for each model under normal running condition
Single Fan
Horse power 8 10 12 14 16
Speed 0~16 0~16 0~17 0~19 0~19
Double Fan
Horse power 18 20 22 24 26
Speed 0~19 0~20 0~21 0~22 0~22
a. In cooling mode
Startup procedure: When compressor starts up, if Ta≥95°F, the outdoor motor will run at the highest class; if
77°F≤Ta<95°F, the outdoor motor will run at the 15 class; if 59°F≤Ta<77°F, the outdoor motor will run at the 6
class, if Ta<59°F, the outdoor motor o, the outdoor motor will run automatically after 45 seconds.
In operation, the motor control by the high pressure. If Pd<33lb, the motor will run at 1 class, o after 1min; if
33lb≤Pd<44lb, the motor will reduce 1 class every 20 seconds, until the lowest class; if 44lb≤Pd<55lb, the motor
runs at the current speed, if 55lb≤Pd<70lb, the motor will raise 1 class every 20 seconds, if Pd≥70lb, the motor will
run at the highest class immediately.
b. In heating mode
When compressor starts up, if Ta<50°F, the outdoor motor will run at the highest class; if 50°F≤Ta<68°F, the
outdoor motor will run at the 5 class; if Ta≥68°F, the outdoor motor will run at the 1 class; the outdoor motor will run
automatically after 60 seconds.
In operation, the motor control by the high pressure. If Pd>81lb, the motor will be o immediately; if 73lb<Pd≤81lb,
the motor will reduce 1 class every 20 seconds; if 62lb<Pd≤73lb, the motor run at the current speed, if
53lb<Pd≤62lb, the motor will raise 1 class every 20 seconds, if Pd≤53lb, the motor will run at the highest class
immediately.
6.4.4 Start Control
①
Evaluate if the compressor has started according to the oil superheat temperature or the heating time of
energized heating trip, in order to prevent prolonged suspension compressor oil from being severely diluted by
refrigerant. The compressor starting conditions are as follows:
·TOi11
·TOi12
·CT
·CT
·TOi11
·TOi12
·TOi11
·TOi12
·CT
·CT
·TOi11
·TOi12
·OR· Power ON
~
after 6 hours
·Dip switch OFF to ON (BM1-3)
·&
·OR
·OR
②
Compressor start protecting control: Within the 3 min after starting; the operating frequency of compressor keeps
at 50rps or 60rps. 3 min later, if Td SH is higher than 77°F, withdrawal from the starting process and conduct target
Pd or target Ps control; 3 min later, if Td SH is lower than 77°F, the frequency goes up to 100rps and withdrawal
from the starting until the Td SH is higher than77°F or the starting time reaches 15min. In the process of starting,
protecting control has the priority.
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