Справочник Пользователя для Lennox International Inc. GWB9-075IH-2

In reset from lockout condition, all electrical meter  

readings at the gas control valve (24 vac) must be 

taken within trial for ignition period.

If any component does not function properly, make 

sure it is correctly installed and wired before replacing 

it.

Static electricity discharge can damage integrated 

boiler control (IBC).  Touch metal surface to discharge 

static electricity before touching IBC.

IBC cannot be repaired.  If it malfunctions it must be 

replaced.

Only trained service technicians should service IBC 

systems.  Following troubleshooting, check out system 

following sequence of operation for a normal light off 

sequence.

All controls are factory tested in the assembly process 

and a defective control is generally the least likely 

cause.  If you suspect you have a defective control, 

read through this section before you replace it. 

It is extremely unlikely that the two consecutive 

controls are defective.  If it seems to be happening, 

chances are that either there is nothing wrong with the 

control or it is being damaged by some other problem 

(an electrical short burning out a transformer, for 

example).

Before troubleshooting:
A.  Make sure that circuit breaker is on or fuse is ok at 

electrical panel.

B.  Make sure that service switch is on.
C.  Make sure that gas is on at the gas meter, at all 

appropriate manual shutoff valves and at the gas 

control valve.

D.  Make sure that the thermostat is calling for heat.
E.  Check that wire connectors at the integrated boiler 

control and at the originating control are securely 

plugged in or connected.

F.  Check that hoses are securely  connected and are 

not plugged or damaged.

Troubleshooting tools:
A.  Voltmeter to check 120 vac and 24 vac
B. Continuity tester.
C.  Inclined manometer or pressure gauge with 

0-3.0” Range (0.01” Scale) for measuring suction 

pressures at pressure switch.

D.  U-tube manometer or differential pressure gauge 

with 0-14” range (0.1” Scale) for measuring inlet 
and manifold gas pressures.

IBC Error Codes.
A.  IBC uses advanced diagnostic capability to assist in 

troubleshooting error conditions.  Table 10, Page 48  

shows error codes that may arise during fault 

condition. 

B.  State Conditions shown in 

 

Table 9, Page 40

  

provide 

suggestions for servicing these potential errors.

Fire, explosion or shock hazard. Do not attempt to 

modify the physical or electrical characteristics of 

this boiler in any way. Failure to comply could result 

in death or serious injury.