APC UTS6H Specifications download pdf (Page 50)

16 - TROUBLESHOOTING

Table 16-1 Alarm Codes for Service Required LED on freewatt

Control Module

ERROR

CODE

INDICATES CHECK OR REPAIR

THERMOSTAT COMMUNICATIONS ERROR

1. CHP MODE SWITCH IN

POSITION

2. CABLES AND CONNECTIONS BETWEEN

THE THERMOSTAT AND THE HI MODULE

3. LOWER FURNACE ACCESS PANEL

INSTALLED

4. IMPROPERLY PROGRAMMED

THERMOSTAT

OUTDOOR SENSOR ERROR

1. CHECK OUTDOOR SENSOR AND CON-

NECTION OR INTERNAL 20k OHM DEFAULT

RESISTOR

MCHP COMMUNICATIONS ERROR

1. RESET SYSTEM POWER

2. POWER TO MCHP

3. CABLES AND CONNECTIONS BETWEEN

HONDA MCHP AND HI MODULE

MCHP DEVICE ERROR (MCHP ASSERTING “FAILURE” STATUS, IE. A HARD ERROR) CHECK HONDA MCHP DIAGNOSTICS

MCHP DEVICE WARNING (MCHP ASSERTING “WARNING” STATUS, IE. A SOFT ERROR)

freewatt

PLUS

FLASH PARAMETER INTEGRITY CHECK ERROR SERVICE REQUIRED

SYSTEM POWER SWITCH OFF, UNABLE TO ENTER BACKUP MODE (NOTE: NOT DEFINED IN HY-

DRONIC SYSTEM)

MCHP PLACED IN LOCKED MODE BY SERVICE TECH, PREVENTS MCHP OPERATION

RESERVED FOR FUTURE USE

ERROR CODE 10 NOT USED

LOW DWELLING TEMPERATURE. BOILER DOWN OR THERMOSTAT “OFF” BY MISTAKE

RESERVED FOR FUTURE USE

VIRTUAL WATCHDOG TIME-OUT. AN UNEXPECTED FIRMWARE EXECUTION ERROR

OCCURRED.

REPLACE CONTROLLER MODULE

EXHAUST GAS LEAK SENSOR FAILURE, HONDA MCHP ERROR 39.0 (EX_SENS_FAIL)

EXHAUST GAS LEAK SENSOR POWER FAILURE, HONDA MCHP ERROR 39.1,(EX_SENS_POWER_

FAIL)

EXHAUST GAS LEAK SENSOR ALARM, COMBUSTION GAS DETECTED, HONDA MCHP ERROR 10.1,

(EX_LEAKAGE_FAIL)

NO DC POWER SUPPLY VOLTAGE DETECTED IN BACKUP MODE. (LOAD_PWR_FAULT)

INDICATES A FAULT IN 120V LOAD

CIRCUIT

DETECTED A freewatt

PLUS

TRANSFER SWITCH COMMUNICATIONS FAILURE Check fTS communications cable

DETECTED A freewatt

PLUS

TRANSFER SWITCH DEVICE ERROR see freewatt

transfer switch IOM

ERROR CODE 20 NOT USED

DETECTED A freewatt

PLUS

TRANSFER SWITCH STATE ERROR see freewatt

transfer switch IOM

RESERVED FOR FUTURE USE

DETECTED A freewatt

PLUS

TRANSFER SWITCH CONTACTOR #1 ERROR see freewatt

transfer switch IOM

DETECTED A freewatt

PLUS

TRANSFER SWITCH CONTACTOR #2 ERROR see freewatt

transfer switch IOM

EXHAUST GAS LEAK SENSOR TEST BUTTON PRESSED

VOLTAGE DETECTED ON THE freewatt

PLUS

TRANSFER SWITCH ISLAND NODES (I1 OR I2) IN

BACKUP POWER MODE

see freewatt

transfer switch IOM

RESERVED FOR FUTURE USE

MISSING L1 OR L2 OF AC POWER (fTS_AC_FAULT)

BLOWN FUSE, FAULTY WIRING, UTILITY

FAULT

29-98

RESERVED FOR FUTURE USE

VIRTUAL WATCHDOG TIME-OUT OCCURRED 5 OR MORE TIMES. MULTIPLE UNEXPECTED FIRM-

WARE EXECUTION ERRORS OCCURRED.

REPLACE CONTROL MODULE

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 67 68

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APC UTS6H Specifications Page 50

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