Operating Instructions and Installation Instructions
ULTRAMAX PB 65 - 120
46 L290 ©MHS Boilers 13/12/2010
Please consult with MHS Technical Department for assistance if fault code displayed is not listed
above.
21.0 Full Parameters List
The following Pages detail the parameters of the boiler and the Standard Factory settings, please note,
the installer/commissioning engineer may have changed some of these settings to suit the system installed,
please refer to System Configurations.
There are two levels of access available, as follows. If you cannot access a particular parameter line,
please consult with MHS Boilers Technical Department for further assistance.
Level ONE
(Customer)
-
Use the ▲ & ▼ Program Buttons to access the desired parameter
line.
Level TWO
(Installer)
-
Press & Hold the ▲ & ▼ Program Buttons until H90 appears (Approx
3 seconds). Use the ▲ & ▼ Program Buttons to access the desired
parameter line.
{If - - - - - appears, Press the MODE button to exit this level and
return to the standard operating display}
Note: Certain parameter lines show Bit numbers. Example: H554 b0.0 this on the display can look
like H554 60.0. These Bit numbers are depicted in the following as a string of 0 and 1. The
first number would be Bit 0.0, so H554 would be 00000101, therefore equal the following:
H554
Bit 0 (b0) 0 Bit 1 (b1) 0 Bit 2 (b2) 0 Bit 3 (b3) 0 Bit 4 (b4) 0 Bit 5 (b5) 1
Bit 6 (b6) 0 Bit 7 (b7) 1
Fault
Code
Description
Fault
Code
Description
Fault
Code
Description
83
Combustion Fan Not
Reaching Ignition Speed
170
RESET Button is Being
Continually Depressed
406
Boiler Flow Temperature
Rising to Above
Maximum Limit
Temperature When
Burner is ON.
87
Combustion Fan
Operating Beneath
Minimum Setting
259
RESET Button Has Been
Pressed When NO Error
Has Been Displayed
422
Boiler Flow Temperature
Rising to Above
Maximum Limit
Temperature When
Burner is OFF.
90
Combustion Fan Not
Reaching Pre-Purge
Speed.
282
Combustion Fan Not
Reaching Correct Speed
96
Flame Rectification
Signal Detected When
Burner OFF
400
System Hydraulic Error.
Return Temperature >
Flow Temperature
433
System Hydraulic Error,
ΔT Between Flow &
Return Too High
97
Flame Rectification
Signal Detection When
Burner OFF
98
Flame Signal Lost During
Operation
401
System Hydraulic Error.
Return Temperature >
Flow Temperature
434
System Hydraulic Error,
ΔT Between Flow &
Return Too High
99
Flame Signal Lost During
Operation
402
System Hydraulic Error.
Return Temperature >
Flow Temperature
435
System Hydraulic Error,
ΔT Between Flow &
Return Too High
100
Flame Signal Lost During
Operation
101
Flame Signal Not
Detected Following Last
Ignition Attempt
403
System Hydraulic Error.
Return Temperature >
Flow Temperature
102
Flame Signal Not
Detected Following Last
Ignition Attempt
404
System Hydraulic Error.
Return Temperature >
Flow Temperature