Lennox LGH 072 User Manual

Page 30
Event Code
Table 8. Alarm Codes
Display Message Action
0 1 ALARM(1) ERRATIC POWER CHECK POWER CONNECTIONS 2 ALARM(2) CHECK SETTINGS RESET CONTROLLER. CHECK UNIT SETTINGS. CONTACT LENNOX IF PROBLEM PERSISTS. 3 Reserved 4 ALARM(4) SMOKE A173 SMOKE MODE. CHECK FOR SOURCE OF SMOKE. 5 ALARM(5) BLOWER S52 UNIT OFF. AIR FLOW SWITCH OPEN 16 SEC AFTER DEMAND. CHECK BLOWER PARTS 6 ALARM(6) FILTER S27 REPLACE FILTER OR CHECK FILTER SWITCH S27 7 ALARM(7) CONTROLLER PROBLEM RESET CONTROLLER. CHECK UNIT SETTINGS. CONTACT LENNOX IF PROBLEM PERSISTS. 8 ALARM(8) STRIKE 3 ON BLOWER S52 LOCKOUT. MULTIPLE CODE 5. CHECK BLOWER PARTS
9 - 11 Reserved
12 ALARM(12) COMP 1 HIGH PRESS S4 COMP OFF. CHECK CHARGE, FANS, COIL. 13 ALARM(13) STRIKE 3 ON COMP 1 HIGH PRESS S4 COMP LOCKOUT. CHECK CHECK CHARGE, FANS, COIL. USE SERVICE MENU TO CLEAR LOCKOUTS. 14 ALARM(14) COMP 2 HIGH PRESS S7 COMP OFF. CHECK CHARGE, FANS, COIL. 15 ALARM(15) STRIKE 3 ON COMP 2 HIGH PRESS S7 COMP LOCKOUT. CHECK CHECK CHARGE, FANS, COIL. USE SERVICE MENU TO CLEAR LOCKOUTS. 16 ALARM(16) COMP 3 HIGH PRESS S28 COMP OFF. CHECK CHARGE, FANS, COIL. 17 ALARM(17) STRIKE 3 ON COMP 3 HIGH PRESS S28 COMP LOCKOUT. CHECK CHARGE, FANS, COIL. USE SERVICE MENU TO CLEAR LOCKOUTS. 18 ALARM(18) COMP 4 HIGH PRESS S96 COMP OFF. CHECK CHARGE, FANS, COIL. 19 ALARM(19) STRIKE 3 ON COMP 4 HIGH PRESS S96 COMP LOCKOUT. CHECK CHECK CHARGE, FANS, COIL. USE SERVICE MENU TO CLEAR LOCKOUTS. 20 ALARM(20) UNIT SHUTDOWN A42 CHECK PHASE MONITOR 21 ALARM(21) STRIKE 3 UNIT SHUTDOWN A42 CHECK PHASE MONITOR 22 ALARM(22) COMP 1 LOW PRESS S87 COMP OFF. CHECK CHARGE, FILTERS, AIR FLOW. COIL 23 ALARM(23) STRIKE 3 ON COMP 1 S87 COMP LOCKOUT. CHECK CHECK CHARGE, FILTER, AIR FLOW, COIL. USE SERVICE MENU TO CLEAR LOCKOUTS. 24 ALARM(24) COMP 2 LOW PRESS S88 COMP OFF. CHECK CHARGE, FILTERS, AIR FLOW. COIL 25 ALARM(25) STRIKE 3 ON COMP 2 S88 COMP LOCKOUT. CHECK CHECK CHARGE, FILTER, AIR FLOW, COIL. USE SERVICE MENU TO CLEAR LOCKOUTS. 26 ALARM(26) COMP 3 LOW PRESS S98 COMP OFF. CHECK CHARGE, FILTERS, AIR FLOW. COIL 27 ALARM(27) STRIKE 3 ON COMP 3 S98 COMP LOCKOUT. CHECK CHECK CHARGE, FILTER, AIR FLOW, COIL. USE SERVICE MENU TO CLEAR LOCKOUTS. 28 ALARM(28) COMP 4 LOW PRESS S97 COMP OFF. CHECK CHARGE, FILTERS, AIR FLOW. COIL 29 ALARM(29) STRIKE 3 ON COMP 4 S97 COMP LOCKOUT. CHECK CHECK CHARGE, FILTER, AIR FLOW, COIL. USE SERVICE MENU TO CLEAR LOCKOUTS. 30 ALARM(30) CHECK 2 AMP FUSE UNIT SHUTDOWN S149 CHECK OVERFLOW SW 31 ALARM(31) STRIKE 3 UNIT SHUTDOWN S149 CHECK OVERFLOW SW 32 ALARM(32) COMP 1 FRZSTAT OPEN S49 COMP OFF. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, OUTSIDE TEMP 33 ALARM(33) STRIKE 3 COMP 1 FRZSTAT OPEN S49 COMP LOCKOUT. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, OUTSIDE TEMP 34 ALARM(34) COMP 2 FRZSTAT OPEN S50 COMP OFF. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, OUTSIDE TEMP 35 ALARM(35) STRIKE 3 COMP 2 FRZSTAT OPEN S50 COMP LOCKOUT. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, OUTSIDE TEMP 36 ALARM(36) COMP 3 FRZSTAT OPEN S53 COMP OFF. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, OUTSIDE TEMP 37 ALARM(37) STRIKE 3 COMP 3 FRZSTAT OPEN S53 COMP LOCKOUT. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, OUTSIDE TEMP 38 ALARM(38) COMP 4 FRZSTAT OPEN S95 COMP OFF. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, OUTSIDE TEMP 39 ALARM(39) STRIKE 3 COMP 4 FRZSTAT OPEN S95 COMP LOCKOUT. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, OUTSIDE TEMP 40 ALARM(40) RETURN AIR OVER HEAT LIMIT RT16 HEAT ABOVE SETPOINT. CHECK SPACE CONDITIONS OR SENSOR 41 ALARM(41) RETURN AIR UNDER COOL LIMIT RT16 COOL BELOW SETPOINT. CHECK SPACE CONDITIONS OR SENSOR 42
ALARM(42) CHECK 2 AMP FUSE UNIT SHUTDOWN S42 OR S135
CHECK EXT MTR OVERLOADS
43 ALARM(43) STRIKE 3 UNIT SHUTDOWN S42 OR S135 CHECK EXT MTR OVERLOADS

Lennox LGH 072 Specifications

General

Brand	Lennox
Model	LGH 072
Category	Air Conditioner
Language	English