Input And Output - Mitsubishi Electric PAC-IF013B-E Installation Manual

5

Input and Output

5.1. Input and output
Inputs
Thermistor
(Refrigerant)
Thermistor
(Air)
Input
(Contact signal)
Input for capacity request
(Analog signal)
Modbus connection
Remote controller
*1. If connected outdoor unit is PUHZ-SHW model, it is not needed. (PUHZ-SHW models include high-pressure sensor instead.)
*2. The operation continues during defrosting operation.
The "Forced Comp. OFF" signal should not be turned ON frequently. It should only be used if an abnormality occurs.
*3. This output is ON when compressor becomes OFF to protect outdoor unit because condition is out of operation range.
(As for operation range, refer to "3.3 Operation range".)
*4. This output is ON more than one minute before defrost starts.
*5. This function is available ONLY with adaptable outdoor unit. Refer to "2.2 Connected outdoor unit models".
5.2. Requirements and guides regarding input, output, and settings
5.2.1 Requirements on capacity step input to the interface unit (Only manual step mode)
(1) Do NOT input STEP 0 for 3 minutes after compressor is ON. (Keep compressor ON for 3 minutes at least.)
(2) Regarding timing of capacity step changes, follow the note below.
Note: Input next capacity step input after supply air temperature becomes stable.
If this note is difficult to follow by local controller,
• The change must be within 5 steps in a single request with at least 5 minutes interval between every change.
• For 6 step changing or more (such as on start-up of operation), the interval between every change needs to be at least 10 minutes.
(See figure 5-1.)
11
8
6
5
WITHIN
5steps
1
0
5min
(3) If you input capacity step request by analog signal, use the center value of each step.
(Regarding center values, refer to the section 4 "Electrical work" in the installation manual.)
10
Ref. liquid temperature (TH2)
2-phase temperature (TH5)
Coil on temperature (TH11)
Target air temperature (TH1)
(Supply air or Return/Room air)
2
Forced Comp. OFF*
Fixed operation mode (Cooling/Heating)
Capacity request
0-10V
1-5V
4-20mA
0-10kΩ
5min
5min
Time
<Fig. 5-1: Examples of step changes>
Availability Outputs
Output
*1
(Contact signal)
7steps
11steps
7steps
7steps
7steps
10min
11
10
0
Availability
Operation ON/OFF
Error
Compressor ON/OFF
Defrost
Cooling mode
Heating mode
Self protection *3
Pre-defrost *4
Time
*5