Toshiba MMD-AP0481HF2UL Service Manual

Also see for MMD-AP0481HF2UL: Service manual Owner's manual Installation manual Manual

– 34 –Check function for operation of indoor unit (Functions at indoor unit side)This function is provided to check the operation of the indoor unit singly without communication with theremote control or the outdoor unit. This function can be used regardless of operation or stop of the system.However, if using this function for a long time, a trouble of the equipment may be caused. Limit using thisfunction within several minutes.[How to operate]1) Short-circuit CHK pin (CN071 on the indoor P.C. board).The operation mode differs according to the indoor unit status in that time.Normal time: Both float SW and fan motor are normal.Abnormal time: Either one of float SW or fan motor is abnormal.2) Restricted to the normal time, if short-circuiting DISP pin (CN072 on the indoor P.C. board) in addition toshort-circuit of CHK pin (CN071 on the indoor P.C. board), the minimum opening degree (30pls) can beset to the indoor PMV only.When open DISP pin, the maximum opening degree (1500pls) can be obtained again.[How to clear]Open CHK pin. While the system is operating, it stops once but automatically returns to operation afterseveral minutes.Fan motorIndoor PMV (∗)CommunicationP.C. board LEDShort-circuit of CHK pin(CN071)Normal timeAbnormal timeDISP pin open(CN071) DISP pin short circuit(CN071)(H) (H) StopMax. opening degree (1500pls) Min. opening degree (30pls) Min. opening degree (30pls)All ignored All ignored All ignoredLights Lights Flashes