Special Function - Mitsubishi Electric SLZ Series Technical & Service Manual

9

SPECIAL FUNCTION

BACK-UP HEATING FUNCTION
9-1. Operation
The back-up heater turns ON when both of the following conditions have been satisfied:
A) When the room temperature has not risen after the heater ON delay time has passed.
Note: The heater ON delay time starts when the condition of "set temperature − room temperature > 1°F [0.5°C]" has been satisfied.
B) Set temperature − room temperature
The back-up heater turns OFF when the following condition has been satisfied:
• Set temperature − room temperature
°C
Set temp. − room temp. 1°F [0.5
9-2. How to change the heater ON delay time
You can set these functions by wired remote controller (Request code).
Note that the change can be made only by the wired remote controller PAR-41MAA.
Notes:
1. If using twin indoor unit system, both main and sub unit should be set in the same setting.
2. Every time replacing indoor controller board for service, the function should be set again.
3. Stop the air-conditioner operation before changing the heater ON delay time.
Request code list
Setting No.
Setting contents
(Request code)
No.1 Monitoring the request
code of current setting
（390)
No.2
10 minutes
（391）
No.3
15 minutes
（392）
No.4
20 minutes
（393）
No.5
25 minutes
（394）
No.6
5 minutes
（395）
9-3. How to connect
When connecting to the connector CN24 of the indoor unit, use PAC-SE56RA-E (optional parts).
Note: For a twin indoor unit system, connect to the CN24 of the indoor unit that the remote controller is connected to.
TCH118
3°F [1.5°C]
]
1°F [0.5°C]
]
The heater output turns ON
when both the conditions A and B
have been satisfied.
°C
3°F [1.5 ]
]
Initial setting
○
Heater output ON
Heater output OFF
26