40 MPS Multi Air Conditioner
Electronic Parts Troubleshooting Guide
6. When Heating does not operate
Operate “Heating Mode(
)” by setting the desired temperature of the
remote control is higher than one of the indoor temperature by 2°C at
least.
In heating Mode, the indoor fan operates in case the pipe temperature
is higher than 28°C.
Check the connector of intake and pipe sensor(thermistors)
• Check the related circuit of R02H(12.1K), R01H(1.0K), R04H(6.2K),
R03H(1.0K).
• Check the indoor room temperature is disconnected or not (about
10K
Ω
/at 25°C).
• Check the indoor pipe temperature is disconnected or not (about
5K
Ω
/at 25°C).
Turn ON Main Power
Check if connection line (Indoor/Outdoor) is complied with Wiring Diagram.
Check Outdoor Unit
(PCB Ass'y)
Correct connection line
Good connection
Bad connection