Mitsubishi Electric M Series Manual page 74

1. CONTROLS
1-6. T-STAT Interface [PAC-US444CN-1], cont.
System Configuration
2. Back-up heating function
1. How to connect the relay
• Connect the connector to CN104 on the indoor electronic control P.C. board.
• Connect the electrical wires with the tag of "OUT" to the relay.
• Separately insulate the wires with the tag of "IN".
Indoor electronic control
P.C. board
2. Operation details
(1) Starting conditions
When both a) and b) are satisfied, the relay turns ON.
a) The HEAT mode is selected. (The unit operates in the HEAT mode when the AUTO operation is selected.)
b) In the figure below, the conditions for ON are satisfied. (NOTE 1)
(2) Releasing conditions
When either a) or b) is satisfied, the relay turns OFF.
a) The modes other than HEAT are selected. (The unit operates in the mode other than HEAT when the AUTO
operation is selected.)
b) In the figure below, the conditions for OFF are satisfied. (NOTE 1)
NOTE 1: Relay (heater) turns ON or OFF by the difference between room temperature and set temperature.
When the ambient temperature
is more than 0°C
When the ambient temperature
is 0 °C or less
Connecting an connector cable to the air conditioner
Models for which the mounting
cord clamp is used
Mounting
cord clamp
Due to continuing improvement, above specification may be subject to change without notice.
74
Room temperature minus
Relay(heater)
set temperature(Initial)
-2.5°C or less
ON
more than -2.5°C
OFF
-1.5°C or less
ON
more than -1.5°C
OFF
Models for which the fastener
is used
Fastener
M-Series - Controls (December 2016)
(Coil rating of DC 12V,
75mA or less.) Use
relay with reinforced
insulation
Relay
Insulate the
wires separately.
Room temperature minus
set temperature
(During operation)
-2.5°C
-1.5°C
0°C
0°C
© 2016 Mitsubishi Electric US, Inc.