Service manual - Logamax plus GB142 (USA/CA) - en - Buderus

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8Actions• Disassemble the supply and return sensors (see fig. 94, pos. 1and 2).1WARNINGTo prevent mix-ups, the supply sensor is markedby a red sleeve on the side of the cable harness.2fig. 94Replacing the supply/return sensors• Dismantle the safety sensor (see fig. 95, pos. 1).1fig. 95Dismantling the safety sensor• Disconnect the hot surface ignitor and ionization electrodeplugs.• Loosen the fastening screws (see fig. 96, pos. 1).• Pull the earth cable from the hot surface ignitor (see fig. 96,pos. 2).• Dismantle the mounting plate (see fig. 96, pos. 3).fig. 96Replacing the hot surface ignitor120Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
Actions 8• Remove both the hot surface ignitor and the ionization electrodeby pulling them loose (see fig. 97, pos. 1).1fig. 97Removing the hot surface ignitor and the ionizationelectrode• Dismantle the condensate trap connection to the condensatecollector (see fig. 98, pos. 1).12fig. 98Dismantling the condensate trap connection to thecondensate collector• Open the four latches of the condensate collector(see fig. 99, pos. 1).1fig. 99Opening the latches of the condensate collectorLogamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 121
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Servicing instructionsCondensing ga
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1Safety and general instructions1.8
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Operation 44 Operation4.1 Operating
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Operation 44.2.2 "Service Mode" men
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Operation 4"ADJUSTMENTS" MENU72Curr
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Function 55.2 Structure diagram "Fu
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Function 5page 163The "Hot water mo
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Function 5page 16, page 186The "Hea
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Symptoms 6The following display val
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Symptoms 6zMaine [1/c/\| e [2/1/0|
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Symptoms 6zMaine [a/0/1| e [8/0/0|
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Diagnosis 77 Diagnosis7.1 Faults wi
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Diagnosis 7page 2819Check that ther
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Diagnosis 7No display, part 3page 3
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Diagnosis 7Hot water mode not opera
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Diagnosis 7Repl. AApage 3312Check t
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Diagnosis 7page 3645Check the tank-
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Diagnosis 7page 3415Check the prima
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Diagnosis 7hot water but no central
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Diagnosis 7page 3648Check the DHW c
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Diagnosis 7No digital pressure disp
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iiliDiagnosis 7Lo0 Y 276The supply
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Diagnosis 7Blocking boiler-fault co
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Diagnosis 7Locking boiler fault cod
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Diagnosis 7Operating code 2U2U 21 3
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Diagnosis 7Blocking boiler fault co
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Page 69 and 70: Diagnosis 76A Branch 05 v1 v8page 6
Page 71 and 72: Diagnosis 76A Branch 07page 6735Che
Page 73 and 74: Diagnosis 7Blocking boiler-fault co
Page 79 and 80: Diagnosis 7Operating code 8Y7 L 2 6
Page 81 and 82: Diagnosis 7Locking boiler fault cod
Page 83 and 84: Diagnosis 7Replace the UBA44Check t
Page 85 and 86: Actions 88.1.2 External connection
Page 87 and 88: Actions 88.1.4 Checking the fan uni
Page 89 and 90: Actions 8• Remove the air suction
Page 91 and 92: Actions 88.1.8 Replacing the supply
Page 93 and 94: Actions 8• Set the main switch on
Page 95 and 96: Actions 8• Switch on the power su
Page 97 and 98: Actions 88.1.17 Checking the ioniza
Page 99 and 100: Actions 88.1.20 Checking the gas co
Page 101 and 102: Actions 8fig. 40 Testing the resist
Page 103 and 104: Actions 8• Loosen three screws on
Page 105 and 106: Actions 8• If the boiler does not
Page 107 and 108: Actions 88.1.25 Measuring the inlet
Page 109 and 110: Actions 88.1.27 Measuring the carbo
Page 111 and 112: Actions 8• Pull both plugs on the
Page 113 and 114: Actions 88.1.30 Burner; replacing
Page 115 and 116: Actions 8• Install the new burner
Page 117 and 118: Actions 88.1.34 Heat exchanger; rep
Page 119: Actions 8• Disconnect the plug an
Page 123 and 124: Actions 8• Loosen the fastening s
Page 125 and 126: Actions 88.1.35 UBA 3; replacing•
Page 127 and 128: Appendix 9Gas orifice diameter Alti
Page 129 and 130: Spare parts 10Pos. Description Prod
Page 131 and 132: Spare parts 10Exploded view Logamax
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Service manual - Logamax plus GB142 (USA/CA) - en - Buderus

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