12.21.2
Causes
1. The wires between the blower motor have been dis-
connected or there is a poor connection.
2. There is no line voltage to the motor.
3. The furnace shared data is faulty or corrupted.
4. The motor has failed.
12.21.3
Solutions
1. Check wiring, connectors and terminals – repair or
replace as necessary.
2. Check line voltage wiring, connectors and terminals
to the inductance and ECM motor. Repair and re-
place as necessary.
3. Replace the furnace memory card with the correct
replacement part.
4. Replace the motor.
12.22
71 - No inducer
communication
12.22.1
Description
When attempting to communicate with the inducer con-
troller module (electronic control to the back of the main
board), communications cannot be established or re-
sponse from the inducer controller module is not as ex-
pected.
12.22.2
Causes
The cause can be interrupted wiring between the main
furnace control and the inducer controller module or in-
terrupted wiring between the inducer controller module
and the inducer itself. Other causes can be a defective
inducer controller module or a defective inducer.
12.22.3
Solutions
Check the wiring between the furnace controller (I.F.C.)
and the inducer controller module. Check wiring between
the inducer controller module and the inducer. Check line
voltage to the inducer controller module. If these are ok,
replace the inducer controller module and/or inducer.
12.23
77 - No gas valve feedback
12.23.1
Description
The furnace control has lost communications with the gas
valve.
12.23.2
Causes
1. The wires, connectors or terminals between the fur-
nace control (or I.F.C.) have become disconnected
or there is a poor connection.
2. The gas valve is faulty.
3. The furnace control is faulty.
12.23.3
Solutions
1. Check the wires, connectors or terminals between
the gas valve and furnace control (or I.F.C.). Re-
place or repair as necessary.
2. Replace the gas valve.
3. Replace the furnace control.
12.24
93 - Control fault
12.24.1
Description
This is a severe fault that should rarely (if ever) be dis-
covered in the field. It is an indicator of an internal micro-
processor fault on the furnace control (or I.F.C.) or voltage
applied to the main gas valve solenoid when there should
be none.
12.24.2
Causes
1. 24VAC or similar voltage applied to the main gas
valve solenoid circuit unexpectedly.
2. Furnace control software test failure – failed fur-
nace control .
12.24.3
Solutions
1. Check for miswiring in the furnace.
2. Replace the furnace control (or I.F.C.).
47
Summary of Contents for Chinook C105-M-V
Page 24: ...Figure 10 Typical gas pipe arrangement 23...
Page 27: ...Figure 11 Wiring Diagram 26...
Page 39: ...Figure 14 Wiring Diagram Modulating t stat 38...
Page 53: ...Table 17 CFM 52...
Page 54: ...Figure 15 Dimensional Drawing 53...
Page 55: ...14 PART LIST 54...
Page 56: ...Figure 16 Exploded view 1 55...
Page 57: ...Figure 17 Exploded view 2 56...
Page 59: ...Table 19 Parts list continued 58...
Page 60: ...Table 20 Parts list MS 59...
