Carrier 58MVP Troubleshooting Manual

Also see for GAS FURNACE 58MVP: Installation, start-up, and operating instructions User's information manual User manual User's information manual User's information manual

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Carrier 58MVP Troubleshooting Manual Manual pdf 18 page image

Fault Code 22SETUP ERROR—This fault indicates that setup switches SW-1 or SW-6 are ON when they should be OFF. Thefollowing combinations will cause the fault:• Thermostat call with SW-1 ON.• Thermostat call with SW-6 ON.• SW-1 and SW-6 both ON together.STEP ACTION YES NO GO TO1. Turn power off and remove blower access panel. — — 22. Make sure thermostat is NOT calling for heating or cooling. Disconnect all thermostat terminal leadsto make sure. — — 33. Is setup switch SW-1 in ON position? 4 6 —4. Put setup switch SW-1 in OFF position. — — 55. Go to page number indicated in Index for CLEANUP AND START-UP INSTRUCTIONS. — — INDEX6. Is setup switch SW-6 in ON position? 7 8 —7. Put setup switch SW-6 in OFF position. — — 58. Replace furnace control board. — — 5Fault Code 23INVALID BLOWER AIRFLOW SELECTION—This fault indicates improper A/C or CF switch setting. The -14units can deliver sufficient airflow for 1-1/2 to 3-1/2 tons A/C and 600 to 1400 CFM for continuous fan. The -20unit can deliver sufficient airflow for 2 to 5 tons A/C and 800 to 2000 CFM for continuous fan. If fault code isflashing, unit still operates, but it defaults to closest allowable airflow.NOTE: Boards with date codes of 9506 or later will flash fault code and set continuous fan airflow to same airflow as A/C if continuous fanis adjusted to a higher airflow than A/C setting.STEP ACTION YES NO GO TO1. Turn power off and remove blower access panel. — — 22. Are air conditioning select switches A/C set properly? (See Table 2.) 5 3 —3. Set air conditioning select switches A/C for proper tonnage as required by condensing unit. — — 44. Go to page number indicated in Index for CLEANUP AND START-UP INSTRUCTIONS. — — INDEX5. Are continuous fan select switches CF set properly? (See Table 3.) 7 6 —6.Set continuous fan select switches CF for desired airflow. This setting should normally be set to DE-FAULT position unless a 2-speed AC/HP is part of system. Use Table 4 for reference on 2-speedAC/HP airflow requirements.— — 47. Are continuous fan select switches CF set to a higher airflow than air conditioning select switchesA/C? (See Tables 2 and 3.) 6 8 —8. Is furnace a 100 size? 11 9 —9. The problem is in the A/C or CF selection circuit. The maximum cooling or continuous fan airflow forthis unit will be delivered. — — 1010. Jiggle A/C and CF switches back and forth. If fault code continues to flash, replace furnace controlboard. — — 411. The problem is in the A/C or CF selection circuit. The minimum cooling or continuous fan airflow forthis unit will be delivered. — — 1212. Jiggle A/C and CF switches back and forth. If fault code continues to flash, replace furnace controlboard. — — 418