Saturday, June23, 2018

' Eberspacher: Diagnosticinstruction Ca1 05 020 Diagnostic Unit'

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Diagnostic Unit
CA1 05 020
The Diagnostic Unit is used for reading displaying and deleting fault codes saved in control unit of the heater The electronic control unit can save
up to 5 fault F1 to F5 The most recent fault code is in memory location F1
The current or actual fault code is shown as AF and is always written into the F1 Previous fault codes are transferred to memory locations F2 to F5
1 Button delete fault memory
2 Button delete fault memory
3 Button switch heater onoff
request diagnostic fault codes
4 Button backwards fault F5 F1 AF
5 Button forward AF F1 F5
6 When available connect the unit to the diagnostic pigtail 8pin black connector on the
heaters main wiring harness located at the heater main If the diagnostic pigtail is not present connect the unit as outlined in the appropriate
heater technical manual A wiring adaptor may be required
Wiring Adaptor Part
D8LC CA1 05 031
HYDRONIC 45 CA1 05 028
D7WB boxed CA1 05 025
D7WB CA1 05 029
D9W HYDRONIC 10 CA1 05 030
HYDRONIC 16243035 CA1 05 036
3 Once correctly connected the Diagnostic Unit display Code Retrieval
4 Press the button on the diagnostic unit to switch on the heater The display shows
5 After 8 seconds the display shows one of the following
No error
Current fault ie fault code 64
Fault diagnosis not possible
Possible causes
o Adapter cable not connected properly
o Control unit defect or incapable of diagnosis
ie control unit not equipped with of the Fault Memory F1 F5 or F5 F1
6 Press the buttons or once or several times to show the individual fault code
memories in decreasing or increasing order The display shows
ie fault memory 2 fault code 10
Only those fault memories occupied by a fault are Fault Memory
7 Eliminate the cause of the fault Be sure to correct the root cause not just the symptom
8 Press both buttons at the same time until the display shows
9 Once the fault memories are deleted the last current fault is shown The current fault is
not reset to 00 until the next restart of the heater providing no other current fault has
occurred The display shows
Heater no faults
End Press button on the diagnosis unit to switch the heater off The display Wait for the end of the heater cool down period
12 Remove the adapter cable from the cable harness and restore the connection
Diagnostic Fault Codes
Note Consult the appropriate and Repair Manual for diagnosis and repair Fault Description
00 Normal operation
01 Warning over voltage
Check batteries and charging system
02 Warning under voltage
04 Warning output short circuit
Refer to heater technical manual
05 Warning output short circuit antitheft alarm
09 TRS shut down Replace control unit
10 Overvoltage shutdown
Check batteries and charging system
11 Undervoltage shutdown
Check air duct or coolant hose for blockage
12 Overheat at overheat sensor
Test overheat sensor
Check air duct or coolant hose for blockage
13 Overheat at flame sensor
Test flame sensor
Excessive temperature rise through the heater
14 Potential overheat detected
Check air duct or coolant hose for blockage
Check air duct or coolant hose for blockage
Too many overheat shutdowns
15 Test overheat sensor
Overheat with excessive temperature AIRTRONIC
Reset control unit using Diagnostic Unit or 7Day Timer
Check air duct for coolant hose for blockage
17 Overheat with excessive temperature Test overheat sensor
Replace control unit
20 Open circuit glow pin glow plug
Test glow pin plug and wire harness
21 Short circuit glow pin glow plug
22 Short circuit glow plug relay contacts Test glow plug relay and replace only D2H control unit
23 Open circuit glow plug relay
Test relay and wire harness
24 Short circuit glow plug relay
25 Short circuit diagnostic output Test diagnostic wire harness for short circuit
Relieve cause of jam
30 Blower motor will not turn
Replace blower if necessary
31 Open circuit blower motor
Test blower motor and wire harness
32 Short circuit blower motor
Measure blower speed using nocontact instrument
33 Blower motor speed deviation 10
Air heater only
34 Open circuit water valve relay Test wiring and relay connections
35 Open circuit partial load resistor relay
Test resistor and wire harness
36 Short circuit partial load resistor relay
37 Coolant pump does not rotate Test coolant pump
38 Open circuit vehicle blower relay Test relay and wire harness
39 Short circuit vehicle blower relay Replace relay
Test water valve relay and wire harness for short circuit
40 Short circuit water valve relay
Replace Fault Description 41 Open circuit coolant pump
Test coolant pump and wire harness
42 Short circuit coolant pump
43 Short circuit external components Test external components for short circuit
47 Short circuit fuelmetering pump Test fuelmetering pump and wire harness for short
48 Open circuit fuelmetering pump circuit
Perform fuelquantity test
Check combustion air and exhaust hose for blockage
50 Too many start attempts Test glow pin glow plug
Test flame sensor
Reset control unit using Diagnostic Unit or 7Day Timer
51 Faulty flame recognition Test flame sensor
Perform fuelquantity test
No start Check combustion air and exhaust hose for blockage
Safety time exceeded Test glow pin glow plug
Test flame sensor
53 Flame cutout in boost mode Flame was established but was 54 Flame cutout in high mode
Perform fuelquantity test
55 Flame cutout in medium mode Check combustion air and exhaust hose for blockage
Test glow pin glow plug
56 Flame cutout in low mode Test flame sensor
57 Flame sensor defect Test connection at flame sensor
58 Flame detected on cool down Test flame sensor
59 Coolant excessive temperature rise Check coolant flow
60 Open circuit temperature control sensor Test external temp sensor and wire harness air heater
61 Short circuit temperature control sensor Test water temperature sensors coolant heater
62 Open circuit Test controller and wire harness
63 Short circuit 64 Open circuit flame sensor
Test flame sensor and wire harness
65 Short circuit flame sensor
71 Open circuit overheat sensor
Test overheat sensor and wire harness
72 Short circuit overheat sensor
Check air duct or coolant hose for blockage
73 Overheat sensor excessive temperature rise
Test overheat sensor
90 Control unit defect internal fault
91 External voltage disturbance Malfunction due to interference voltage from vehicle
electrical system ie poor battery or charger
92 Control unit defect ROM error
Remove interference voltage
93 Control unit defect RAM error Replace control unit
94 Control unit defect EEPROM error
Replace control unit or use external air temperature
96 Control unit defect internal temperature sensor
sensor air heater
97 Control unit defect Replace control unit

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