Airwell ONG3-17 R410A, Service Manual

Page: 78 / 127

CONTROL SYSTEM
Service Manual-CN Fixed RPM series
12-43
12.13.2 Time adjustment in Sleep Mode
In 10V6, the user can make use of the Off-Timer to extend the Sleep Time from 7 hours to 12
hour (max). The operation of the new “Extended Sleep Mode” is illustrated by the graphs
below.
Case 1 is the Standard Sleep Mode, which is the only sleep mode in previous version of MCU.
The A/C unit simply works for 7 hours, then goes to SB.
Case 2 is the new Extended Sleep Mode. If an active Off-Timer is set to turn off the A/C
between 7-12 hour, relative to the starting of Sleep, the Sleep time is extended. And, instead
of going to SB at the 7th hour, the A/C will work until reaching the Off-time.
Case 3 is an exception to case 2. The Sleep Mode will not be extended to the Off-Time
when the Off-Timer is preceded by an On-Timer, which is also between 7-12 hour.
Oper
Time [Hr]
4 8 10 12 2 6
Start
Sleep
7
Case 1 : Standard Sleep Mode
Condition : Off-timer is not set or is beyond 12 hour.
SB
Oper
Time [Hr]
4 8 10 12 2 6
Start
Sleep
7
Case 2 : Extended Sleep Mode
Condition : Off-timer is set at 7-12 hour.
SB
Off-timer
Oper
Time [Hr]
4 8 10 12 2 6
Start
Sleep
7
Case 3 : Exception to Case 2
Condition : Off-timer is set at 7-12 hour
On-timer is set at 7-12 hour and before Off-timer
SB
Off-timer On-timer