Carrier 42NQV025H Service Manual

Contents

Alphanumeric characters areused for the check codes.is 5. is 6.is A. is B.is C. is D.ON OFFPress [ ] button with a tip of pencil to set theremote controller to the service mode.• “ ” is indicated on the display of the remotecontroller.Press [ ] or [ ] buttonIf there is no fault with a code, the indoor unit will beeponce (Beep) and the display of the remote controller willchange as follows :• The TIMER indicator of the indoor unit flashes continuously.(5 times per 1 sec.)• Check the unit with all 52 check codes ( to )as shown in Table-11-4-1.• Press [ ] or [ ] button to change the checkcode backward.If there is a fault, the indoor unit will beep for 10seconds (Beep, Beep, Beep...).Note the check code on the display of the remotecontroller.• 2-digits alphanumeric will be indicated on the display.• All indicators on the indoor unit will flash.(5 times per 1 sec.)Press [ ] button to release the service mode.• The display of the remote controller returns to as itwas before service mode was engaged.Time shortening method.1. Press button while pushing button.2. Press [ ] button.1234• • •Fig. 11-4-111-4. Self-Diagnosis by Remote Controller (Check Code)1. If the lamps are indicated as shown B to E in Table 11-3-1, execute the self-diagnosis by the remote controller.2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condi-tion and indicates the information of the self-diagnosis on the display of the remote controller with the checkcodes. If a fault is detected, all lamps on the indoor unit will flash at 5Hz and it will beep for 10 seconds(Beep, Beep, Beep ... ). The timer lamp usually flashes (5Hz) during self-diagnosis.11-4-1. How to Use Remote Controller in Service ModeON OF FON OF FFILE NO. SVM-07013-1− 70 −