IK1600171 - Espar® Heater

Page 1 of 9

Countries:

CANADA, UNITED
STATES, MEXICO

Document
ID:

IK1600171

Availability:

ISIS, FleetISIS

Revision:

0

CAB / SLEEPER /
Major System:
HOOD

Created:

12/13/2012

Current
Language:

English

Last
Modified:

12/18/2012

Other
Languages:

NONE

Author:

Kevin
Beirne

Viewed:

676
Less Info

Coding Information

Hide Details

Copy Link

Copy Relative
Link

Bookmark

Add to
Favorites

Print

Provide
Feedback

View My
Bookmarks

Helpful

Not Helpful

9

0

Title: Espar® Heater
Applies To: 2007-2010 ProStar and LoneStar with Feature Codes 16UZL

Description
This article provides for the diagnosis and repair procedure for the Espar Hydronic Heater.

Feature Codes Covered By This Article
16UZL
Triage
Check Vehicle History
Check for any Open Campaign
Customer Questionnaire:
1) Can you hear the heater start up?
2) Is there warm/hot air coming out of the vents?
3) When is the heater malfunctioning? Is it intermittent?
4) How many attempts have been made before it stopped working altogether?
5) When was the last time the heater was run with no known issues? How long did it run for?

Verify complaint using cab controls (use link below):
Espar Heater Control Switches

https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 1/3/2013

IK1600171 - Espar® Heater

Page 2 of 9

Preliminary Checks
Review the customer concern and perform basic troubleshooting.
Basic Troubleshooting should be performed prior to an major troubleshooting or disassembly of
the heater.
In the event of failure, first check the following:
Battery
Fuses
Fuel
Coolant
For

Transfer (kinked hoses?)

interference in combustion air or exhaust pipes

NOTE:
If the customer has attempted to start the heater more than 20 times, or if 3 consecutive
overheats have been detected, the heater will lock.
To unlock the control unit you will need to use the Fault Code Retrieval Device:
To unlock the control unit you must be equipped with the EDiTH diagnostic software and ISO
Adapter.
Must run "General Data Test" and then select "Error" tab, then click the "Delete" button.

Special Tools

FIGURE B

FIGURE A

DESCRIPTION:
The Espar Heater Diagnostic Tools have been released for diagnosing the following Espar

https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 1/3/2013

IK1600171 - Espar® Heater

Page 3 of 9

Heaters:
The ISO Adaptor (for EDiTH Diagnostics) ESP2215418900000Z (Figure A) is used
for all Espar Heaters.
 The ‘Y’ adaptor ESP2029007050280Z (Figure B) is used with the ISO Adaptor for the
Hydronic D5 SC heater and 12V DC NO IDLE HVAC System.

TROUBLESHOOTING


Use the below link for "No Start" and "Heater Stops" conditions:
HYDRONIC TROUBLESHOOTING
To troubleshoot using the EZTech, follow the steps in the link below for connection
procedure.
HYDRONIC D5 ADAPTER AND EDiTH ISO ADAPTER
System Tests using EDiTH Software (Use to diagnose or verify repairs, record readings
on R.O.)
DIAGNOSTIC TESTS, FUNCTION TEST, FAULT CONDITIONS, AND COMMON ISSUES
FAULT CODE TABLE (Address Active Codes First)
For Wiring diagrams and DTC Table, refer to table below. To Print - click link below:

ESPAR D5 WIRING DIAGRAMS (MODEL # SPECIFIC)
ESPAR D5 DTC TABLE
FAULT CODE

FAULT
DESCRIPTION

000
replace

Normal Operation

CAUSES/REPAIR

010

Overvoltage

Check voltage between terminals 1 (red)
and 2 (brown) at connector (B1). If voltage
is > 15 volts then check battery, electrical
leads and vehicle charging system.

011

Under voltage
shut down

Check voltage between terminals 1 (red)
and 2 (brown) at connector (B1). If voltage
is < 10 volts, then check battery, electrical
leads and vehicle charging system.

Overheating

Check for possible causes of overheat
(water circuit), Sensor. Check overheat
switch resistance values. Temperature at
temperature sensor or overheat sensor is
greater than 125 degrees Celsius.

012

Possible
overheating

Difference of measured values at
temperature sensor > 25 degrees Celsius
(min. 80 degrees Celsius water
temperature and metering pump in

https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 1/3/2013

IK1600171 - Espar® Heater

014

detected
(difference
evaluation)

Page 4 of 9

operation); Check temperature sensor and
overheating sensor, replace if necessary.
Check for air in coolant system. Check
values from previous page.

Too many
overheats

Remove cause of over heat. Reset control
unit using an Espar diagnostic option.
Permanent overheating counter reading
exceeded. Heating enable only possible
by means of diagnostics system (press
both "LL" keys simultaneously).

017

Overheating
detected

Temperature at temperature or
overheating sensor > 130 degrees celsius,
emergency OFF if Fault Code 012 or 014
not applicapble; check water circuit, check
temperature sensor and overheating
sensor; replace if necessary. See graph
HERE.

020

Open circuit glow pin

Check glow pin and electrical leads for
continuity, replace if necessary

021

Short circuit glow pin

Check glow pin and electrical leads for
continuity, replace if necessary

030

Combustion air
blower motor

Blower impeller or electric motor may be
jammed (frozen solid, dirty, etc.) Fix jam,
replace electric motor if necessary.

031

Combustion air
blower motor

Check lead to combustion air motor for
continuity, replace motor if necessary.

032

Combustion air
blower motor
short-circuit

Check combustion air blower motor
(electric motor); replace if necessary.
Check power supply (chafed, corroded
etc.)

038

Check electric lead to relay, fix break,
Vehicle fan relay replace relay if necessary. For wiring
control break
harness (20 2900 70 0401) without relay,
replace harness.

039

Check electric lead to relay, fix break,