Electra OU10-36 ST Service Manual download pdf (Page 75)

13-4

CONTROL SYSTEM

SM DNGRPM 1-E.4 GB

13.3 General functions for all models

13.3.1 COMP operation

o For each Mode including POWER OFF & SB, a Min time delay of 3 min before

COMP restarting, excluding DEICING Mode.

o The Min operation time of COMP under different operating conditions is

Operation Mode

Min operation time of

COMP

Heat, Cool or Auto Modes 3 min.

Fan, Dry, Overflow, Protection modes, or mode change ignored

13.3.2 IFAN operation

o Whenever the IFAN starts from OFF to ON it will start in Low speed for 25 sec and

then will go to ANY speed.

o Min time interval between IFAN speed change in AUTOFAN Mode, is 30 sec.

o Min time interval between IFAN speed change in H/M/L Mode is 1 sec.

o IFAN speed in Heat/Cool Autofan Mode is determined according to the following

table:

T

IFAN Speed

T  2

HIGH

2 T  1

MED

1 T

LOW

where in Heat Mode:T = SPT-RT

in Cool Mode:T = RT-SPT

Note:

1. In Heat Mode, the rules in section 4.0.3 have the higher priority.

2. The table above can be represent by a hysteresis curve which will minimize

the switching of the IFAN relay and will minimize the change in IFAN speed:

T [

IFAN speed

321

CONTENTS

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 159 160

No comments

Electra OU10-36 ST Service Manual Page 75