Electra Delta 25 Service Manual page 30

CONTROL SYSTEM
11.1.3.3 Frequency Changes Control
Frequency change rate is 1 Hz/sec.
11.1.3.4 Compressor Starting Control
Frequency
Step 3
Step 2
Step 1
Minute
11.1.3.5 Minimum On and Off Time
3 minutes.
11.1.4 Indoor Fan Control
10 Indoor fan speeds are determined for each model. 5 speeds for cool/dry/fan modes and 5 speeds
for heat mode.
When user sets the indoor fan speed to a fixed speed (Low/ Medium/ High), unit will operate constantly
at set speed.
When Auto Fan is selected, indoor unit controller can operate in all speeds. The actual speed is set
according to the cool/heat load.
11.1.4.1 Turbo Speed
The Turbo speed is activated during the first 30 minutes of unit operation when auto fan speed is
selected and under the following conditions:
 Difference between set point and actual room temperature is bigger then 3 degrees.
 Room temperature > 22 for cooling, or < 25 for heating.
11.1.5 Heating Element Control
Heating element can be started if LOAD > 0.8 * MaximumNLOAD AND Indoor Coil temperature
< 45.
The heating element will be stopped when LOAD < 0.5 * MaximumNLOAD OR if Indoor Coil
temperature > 50.
11.1.6 Outdoor Fan Control
11.1.6.1 The following are the speeds types (General Rules):
High Speed Output
MCU
11-2
1
Minute
1
Min 10 Minutes
Relay
Low Speed Output
Triac
CONTENTS
Time
OFAN
motor
SM DELTAZ 1-E.0 GB