Electra DELTA 22, Руководство по обслуживанию

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11-3
CONTROL SYSTEM
Revision Y05-02 Service Manual - Delta DCI
11.1.9 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.
11.1.10 Outdoor Fan Control
•
The OFAN motor is an AC type that operates with 2 speeds (Low/High),
controlled by Relays.
•
OFAN speed depends on the compressor Target Frequency, and it’s set according to the
following table and graphs.
•
OFAN can change its Speed only if it has been working in the current
speed for
at least 35 seconds:
Compressor
Target Frequency
OFAN Speed
Normal cases
State A at cool / Heat
State B
at cool
State C
at cool
OAT>15 o C
at heat
Freq=0 OFF OFF OFF OFF
10 ≤ Freq < OFLowFreq Low Low Low Low
OFLowFreq ≤ Freq< OFMedFreq High Low Low Low
OFMedFreq≤ Freq High Low Low High
Notes:
When OAT is faulty or disabled OFAN will follow ‘Normal cases’ rules (left column).
1. OFLowFreq =
OFLowFreqC
in cool mode, and
OFLowFreqH
in heat mode.
2. OFMedFreq =
OFMedFreqC
in cool mode, and
OFMedFreqH
in heat mode.
The OFAN will be off when the compressor is off.
•
An exception for the following rule is when compressor was operating in cool
mode before stopped. In this case OFAN will remain on in low speed for 1
minute.
•
Whenever the indoor unit is under indoor coil overheating protection, as long as the
protection status is HzD2, the outdoor fan will change to off. It will be enabled to be back on
when the status of this protection becomes normal.
•
Upon receiving night mode signal (ON), through communication, the OFAN will be
operating in LOW speed only in Cool. It will be back to its normal operation when receiving
OFF signal.
OAT
OFAN St at e
at Cool Mode
20
A
B
C
3 Degrees
3 Degrees
7
Not e: Per i or i t i es A>B>C