External Input/Output Specifications - Mitsubishi Electric PQRY-P200YEM-A Service Handbook

[6] External Input/Output Specifications

(1) Output
1 Operation ON signal
Terminal No. TB8-1, 2
Output Relay contacts output
• When DIP switch 2-7 is OFF
Operation
• When DIP switch 2-7 is ON
2 COMP ON/OFF signal
Connector No. CN51-3, 4
Output DC 12 V
Operation DC 12 V is output during compressor operation.
3 Water freeze / trouble signal
Connector No. CN51-3, 5
Output DC 12 V
• When DIP switch 3-3 is OFF
Operation
• When DIP switch 3-3 is ON
(2) Input
1 Pump Interlock
Terminal No. TB8-3, 4
Input Level signal
Operation If the circuit between TB8-3 and TB8-4 is open, compressor operation is prohibited.
2 Demand
Connector No. CN3D-1, 3
Input Level signal
Operation If the circuit between CN3D-1 and CN3D-3 is opened, compressor operation is prohibited.
Rated voltage: L1 - N: 220 ~ 240 V
Rated load: 1 A
The relay closes during compressor operation.
The relay closes during reception of the cooling or the heating operation signal from the controller.
(Note: It is output even if the thermostat is OFF (when the compressor is stopped).)
Connector : B5B-XH-A (JST)
Connector : B5B-XH-A (JST)
If the water temperature (TH 6) drops below 5°C while the unit is stopped, DC 12 V is output.
DC 12 V is output when the heat source unit is stopped abnormally.
Connector : B3B-EH (JST)
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