950-0097-revK 7/11/08 SEA BREEZE Mini-Split Troubleshooting Guide 9A23YGX, 12A23YGX, 12A23ZGX 18A23ZGX 9H43YCX, 12H43YCX 12H43ZGX, 18H43ZGX 24H43ZCX, 24A43ZCX PAGE 3 PAGE 8 PAGE 12 PAGE 17 PAGE 24 PAGE 33 Notes on normal operation • • • • • • • • Indoor fan is engineered to run continuously. The purpose of this is to circulate room temperature air around the ambient temperature sensor (located inside the indoor unit), for better temperature control.
950-0097-revK 7/11/08 Refrigeration Troubleshooting Hints: Pressure Readings In order to determine proper efficient operation of these units, It is necessary to check operating pressure. Units that are equipped with 2 service ports, (Liquid and Suction line) often are misunderstood as having a high pressure port. Pressures read at either port should be interpreted as low pressure readings. The differential between the 2 ports should be no more than 15 PSI.
950-0097-revK 7/11/08 9A23YGX, 12A23YGX, 12A23ZGX Unit does not run It is assumed that at this point that the proper checks have been made and corrected if necessary. If not, Go to page 1 and see “Prior to troubleshooting”. Check Flash Codes Turn unit to “ON”. Carefully watch the indicator lights on the indoor unit. Compare the results to the flash code chart below.
950-0097-revK 7/11/08 9A23YGX, 12A23YGX, 12A23ZGX (CONTINUED) Press the On/Off button on the remote. Did you hear an audible beep from the indoor unit? Yes No Normal response Unit will not beep if any of these conditions apply: • Indoor unit is not receiving power Verify power input to the indoor unit by checking for line voltage between terminals N(1) and 3 on indoor unit. • Blown fuse on the Indoor control board. (Remove the control board from indoor unit and check the fuse located there. Fuse is 3.
950-0097-revK 7/11/08 9A23YGX, 12A23YGX, 12A23ZGX (CONTINUED) Unit runs but does not operate properly. It is assumed that compressor, outdoor fan, and indoor fan is operating properly. Set unit to “COOL” mode. Set temperature to 61°.
950-0097-revK 7/11/08 9A23YGX, 12A23YGX, 12A23ZGX (CONTINUED) If unit operates but will not cool Check the filters of the indoor unit. Verify that there is NO blockage in and around both indoor and outdoor unit. Check for proper suction pressure. Is suction pressure between 60 and 70 PSI? Yes No Normal response The refrigeration system of this unit will not operate properly if the refrigeration level is too low or too high.
950-0097-revK 7/11/08 9A23YGX, 12A23YGX, 12A23ZGX (CONTINUED) Notes:_____________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ _____________________________
950-0097-revK 7/11/08 18A23ZGX The outdoor unit control board provides LED indicators of system status and malfunctions. To access this board: o Remove side panel of outdoor unit. o Compare the flash codes to the Flash Code Chart.
50-0097-revK 7/11/08 18A23ZGX (CONTINUED) Unit does not run It is assumed that at this point that the proper checks have been made and corrected if necessary. If not, Go to page 1 and see “Prior to troubleshooting”. Reset the system with the reset button on the outdoor unit control board. Press the On/Off button on the remote.
950-0097-revK 7/11/08 18A23ZGX (CONTINUED) Unit runs but does not operate properly. It is assumed that compressor, outdoor fan, and indoor fan is operating properly. Turn unit to COOL mode. Set temperature to 61°. Is outdoor fan running? Yes No Normal Response The outdoor fan will not operate if any of the following conditions apply: • No call for cooling (verify that there is a call for cooling) • Blown fuse on outdoor control board Replace fuse with 3.15amp 250V fuse.
950-0097-revK 7/11/08 18A23ZGX (CONTINUED) If unit operates but will not cool Check the filters of the indoor unit. Verify that there is NO blockage in and around both indoor and outdoor unit. Check for proper suction pressure. Is suction pressure between 60 and 70 PSI? Yes No Normal response The refrigeration system of this unit will not operate properly if the refrigeration level is too low or too high.
950-0097-revK 7/11/08 Notes:_____________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ _____________________________________________________________________
950-0097-revK 7/11/08 9H43YCX, 12H43YCX Unit does not operate in Heat Mode Turn unit on and turn to heat mode. Adjust temperature to a setting above ambient. Watch Red LED on unit. After a few minutes, it should either turn on or blink. If the light blinks, count the blinks if there are 7 blinks (Error code E7), check the gray sensor cable between the indoor and outdoor unit. Check this cable for shorts or opens, and make sure that it is connected properly. Repair or replace as necessary.
950-0097-revK 7/11/08 9H43YCX, 12H43YCX (CONTINUED) Unit runs but does not operate properly. It is assumed that compressor, outdoor fan, and indoor fan is operating properly. Turn unit to COOL mode. Set temperature to 61°. Is outdoor fan running? Yes No Normal Response The outdoor fan will not operate if the following conditions apply • No call for cooling (verify by checking for line voltage on terminals N(1) and 1 of outdoor unit.
950-0097-revK 7/11/08 9H43YCX, 12H43YCX (CONTINUED) If unit operates but will not cool (or heat) Check the filters of the indoor unit. Verify that there is NO blockage in and around both indoor and outdoor unit. Check for proper suction pressure. Is suction pressure between 90 and 145 PSI? Yes No Normal response The refrigeration system of this unit will not operate properly if the refrigeration level is too low or too high.
950-0097-revK 7/11/08 Notes:_____________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ _____________________________________________________________________
950-0097-revK 7/11/08 12H43ZGX This model operates on DC inverter technology. Many of the operational assumptions of standard unitary systems do not apply to this unit. Please read the troubleshooting guide thoroughly, prior to making assumptions that the unit is not operating properly. Model Specific Notes: • In cool (or heat) mode the compressor is a continuous run unit. The compressor does not start and stop.
950-0097-revK 7/11/08 12H43ZGX Flash Codes LED 2 Communications Indicator This LED will flash randomly signifying transmit/receive communications from indoor unit. If this light is not flashing, a communications problem may exist. Check the following: • Ground line between indoor and outdoor unit. • Data line (Terminal 2) between indoor and outdoor unit.
950-0097-revK 7/11/08 12H43ZGX Control Board LED Flash Codes LED 1 FLASHES 1 2 3 4 5 6 7 8 TRANSLATION compressor discharge pressure protect SIPM module protect current overload protect overload protect anti-freeze protect sensor error communication error SUGGESTION normal operation gas leak, discharge sensor error See LED 7 Current overload, Voltage too low (replace outdoor control board) See LED 2 check/ replace indoor temperature sensor See LED 2 See LED 2, check communications line, replace outdoor PC
950-0097-revK 7/11/08 12H43ZGX Unit does not run It is assumed that at this point that the proper checks have been made and corrected if necessary. and no error codes exist from the main control board in the outdoor unit. Press the On/Off button on the remote. Did you hear an audible beep from the indoor unit? Yes No Normal response Unit will not beep if any of these conditions apply: • Unit is not receiving power • Blown fuse on the Indoor control board.
950-0097-revK 7/11/08 12H43ZGX (CONTINUED) Unit runs but does not operate properly. It is assumed that compressor, outdoor fan, and indoor fan is operating properly. Turn unit to COOL mode. Set temperature to 61°. Is outdoor fan running? Yes No Normal Response The outdoor fan will not operate if the following conditions apply • No call for cooling • Defrost Mode • No Control Power to fan Check outdoor control board connectors X7 and X21 for line voltage.
950-0097-revK 7/11/08 12H43ZGX (CONTINUED) If unit operates but will not cool (or heat) Check the filters of the indoor unit. Verify that there is NO blockage in and around both indoor and outdoor unit. Check for proper suction pressure. Is suction pressure between 90 and 145 PSI? Yes No Normal response The refrigeration system of this unit will not operate properly if the refrigeration level is too low or too high.
950-0097-revK 7/11/08 12H43ZGX (CONTINUED) Notes:_____________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ________________________________________________
950-0097-revK 7/11/08 18H43ZGX This model operates on DC inverter technology. Many of the operational assumptions of standard unitary systems do not apply to this unit. Please read the troubleshooting guide thoroughly, prior to making assumptions that the unit is not operating properly. Model Specific Notes: • In cool (or heat) mode the compressor is a continuous run unit. The compressor does not start and stop.
950-0097-revK 7/11/08 18H43ZGX IF YOU HAVE NO FLASHING LEDS: Check both fuses on the main control board and replace if necessary. If you still receive no flash codes, perform the following checks. If the outdoor unit is receiving power from the disconnect source and your cabling (indoor to outdoor) is correct, Regardless of the mode, the communications lights (LED6 and LED8) should flash. Check the control output voltages from the main control board.
950-0097-revK 7/11/08 TROUBLESHOOTING FLASH CODES Flash codes for the diagnosis of Mini-Split Systems Model Number: MS418HP13240CA one Compressor operate (Normal Operation) Discharge protect Sensor on output of compressor (liquid Line) will stop compressor operation if liquid line gets too hot. Check Exhaust temp sensor (yellow connector on two mainboard) SIPM module protect with shutdown. High temperature condition of IPM module. Should go away when IPM cools down.
950-0097-revK 7/11/08 LED 3 Quick cooling/heating. Usually on Startup or immediately after a large change one in set point Temperature. (Normal condition unless it is continuous) two Defrost (in defrost mode) three Oil return four Rated cooling/heating capacity five Max cooling/heating capacity six Med cooling/heating capacity seven Min cooling/heating capacity LED 6 LED 5 LED 4 Shutdown (Will be active if unit is shutdown for errors or unit is turned off with eight remote.
LED 7 950-0097-revK 7/11/08 18H43ZGX (continued) one Stop replacement (system ready) two Instant current expand or too low 17 RPM voltage. Replace IPM.
950-0097-revK 7/11/08 IPM MODULE Code Explanations There are (2) LEDs on the IPM module. During normal operation the Green LED will be illuminated when the compressor is in operation. If the green LED is illuminated and the compressor is not operating, Shutdown unit by removing the disconnect or turning off the breaker, wait 1 minute then restart. Unit will attempt to restart after 3 minutes.
950-0097-revK 7/11/08 Unit does not run It is assumed that at this point that the proper checks have been made and corrected if necessary, and no error codes exist from the main control board in the outdoor unit. Press the On/Off button on the remote. Did you hear an audible beep from the indoor unit? Yes No Normal response Unit will not beep if any of these conditions apply: • Unit is not receiving power • Blown fuse on the Indoor control board.
950-0097-revK 7/11/08 18H43ZGX (CONTINUED) Unit runs but does not operate properly. It is assumed that compressor, outdoor fan, and indoor fan are operating properly. Turn unit to COOL mode. Set temperature to 61°. Is outdoor fan running? Yes No Normal Response The outdoor fan will not operate if the following conditions apply • No call for cooling (Make sure that set Point is set at 61°F and unit is in cool mode.
950-0097-revK 7/11/08 18H43ZGX (CONTINUED) Check for proper suction pressure. Is suction pressure between 58 and 87 PSI? Yes No Normal response The refrigeration system of this unit will not operate properly if the refrigeration level is too low or too high. Check pressures at the Suction port of the Outdoor unit. (Larger Line). • If the pressure is high, evacuate to proper pressure, removing small amounts each time, until suction pressure is within range.
950-0097-revK 7/11/08 MS424A13230A, 24H43ZCX Check error codes (displayed on indoor unit) against the chart below and correct if necessary. ERROR CODE TRANSLATION SUGGESTION E3 Sensor Fail Indoor pipe temperature sensor fail (replace) E2 Sensor Fail Indoor room temperature sensor fail (replace) E4 Outdoor unit abnormal See chart Below E7 Defrost Sensor Fail Defrost sensor (2 conductor gray cable that runs between indoor and outdoor unit is either open or shorted.
950-0097-revK 7/11/08 MS424A13230A, 24H43ZCX If Indoor unit does not show a displayed error code, use the chart below. LED FLASHES RUN TIMER 4 times/6 seconds TRANSLATION Anti-Freeze Protect SUGGESTION Indoor fan (if not operating, check and replace.) Coil Temp Sensor (check and replace if necessary.) Clogged Evaporator (check and replace if necessary) Control Board (check and replace if necessary) 1 time/1 second Low amb temp.
950-0097-revK 7/11/08 24A43ZCX, 24H43ZCX (CONTINUED) Press the Mode button, changing the unit to fan mode (shown by the fan icon on the remote display.) Did the indoor fan start operating? Yes No Normal response Indoor fan will not operate if the following conditions apply: • Timer function is activated (Look for the timer off Icon in the bottom of the remote display. If it is active. Deactivate it by pressing the Timer ff button until the TIMER OFF icon disappears.
950-0097-revK 7/11/08 24A43ZCX, 24H43ZCX (CONTINUED) Is the compressor running? Yes No Normal Response The Compressor will not operate if any of the following conditions apply: No Call for Cooling (verify that there is a call for cooling) Compressor time delay is in effect. Wait 3-5 minutes for compressor delay to expire. Defrost Mode No control power to compressor. Verify that there is control voltage by checking for voltage on terminals L4 and 1 of the outdoor unit. This should be line voltage.
950-0097-revK 7/11/08 24A43ZCX, 24H43ZCX (CONTINUED) If unit operates but will not cool (or heat) It is assumed that compressor, outdoor fan, and indoor fan is operating properly. Check the filters of the indoor unit. Verify that there is NO blockage in and around both indoor and outdoor unit. Reversing valve will be energized with line voltage on a call for heat. Check for proper suction pressure.
950-0097-revK 7/11/08 9A23YGX, 12A23YGX, 12A23ZGX, MS218A13240 Pressures. Typical pressure for the models listed above should be between 60 and 75 PSI as checked on the suction pressure service port. Pressure at the liquid line service port (if equipped), should be approximately 10 PSI above the suction pressure. There is no high pressure service port available on these models.
