Specifications
71
Control modes RemarksControl details
5-2. Compulsory step-up
When any of the following conditions are satisfied, the step will be forced to 3.
(1) The discharge temperature (TH4) is 110: or more.
(2) The condenser/evaporator temperature (TH6) is 62: or more.
5-3. Stop control
When the LEV is being stopped, the step will be set to 3.
5. LEV(B)
RP1.6~ 6
5-1. Normal control
Opening pulse will vary among steps (1 to 3) according to air conditioner’s
operating status.
• Control timing: Once every 5 minutes after 3 or 7 minutes have passed since
the compressor started.
• LEV opening pulse for each step:
• Start-up step
The step is set to 2 when the compressor starts up.
• Requirement for step-up
LEV opening pulse will step up when any of following conditions is satisfied.
(1) The discharge temp. (TH4) is 100: or more
(2) The outdoor condenser/evaporator temperature (TH6) is 57: or more
(3) The discharge super heat temperature is 50: or more
Super heat temperature = Discharge temperature (TH4) - Outdoor
condenser/evaporator temperature (TH6)
(4) The sub cool temperature is 12: or more
Sub cool temperature = Outdoor condenser/evaporator temperature (TH6)
- Outdoor liquid pipe temperature (TH3)
• Requirement for step-down
LEV opening pulse will step down when any of following conditions are
satisfied and above step-up conditions are not satisfied.
(1) The discharge temperature (TH4) is 90: or less
(2) The outdoor condenser/evaporator temperature (TH6) is 52: or less
(3) The discharge super heat temperature is 40: or less
Super heat temperature = Discharge temperature (TH4) - Outdoor
condenser/evaporator temperature (TH6)
(4) the sub cool temperature is 3: or less
Sub cool temperature = Outdoor condenser/evaporator temperature
(TH6) - Outdoor liquid pipe temperature (TH3)
• The step does not change if neither step-up conditions nor step-down
conditions are satisfied.
Step
200
300
480
150
300
480
170
300
480
150
300
480
RP4VHA RP5VHA RP6VHA
RP4VHA
1
RP4YHA
RP5VHA1
RP5YHA
RP6VHA1
RP6YHA
180
300
480
180
300
480
185
300
480
180
240
480
180
240
480
185
240
480
1
2
3
RP3VHA
RP1.6VHA
RP2VHA
RP2.5VHA
OCT04B-3.qxp 05.11.29 11:30 AM Page 71