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ULTRAMAX PB 65 - 120
42 L290 ©MHS Boilers 13/12/2010
17.0 Error Message List
17.1 Error Messages Displayed via AGU Operating Panel
Display flashes
Code No.
Error Description
Explanation of possible error causes, suggested
corrections.
10
Exterior temp. sensor fault or not detected
Check AT sensor, emergency operation
20
VL boiler sensor fault or not detected
Check connections, exchange
28
Exhaust sensor fault or not detected
Check connections, exchange
40
RL boiler sensor fault or not detected
Check connections, exchange
50
HWS Sensor fault or not detected
Check connections, exchange
61
Fault room device QAA 73
Check QAA 73 room device and bus line
62
Wrong room device fitted QAA 73
Connect proper QAA 73 room device
81
Short at LPB bus or no supply to bus
Communication error, LPB bus feed not activated
82
LPB bus address error
Check addressing of connected RVA controller or OCI460 clip
in module.
91
Data loss at LMU ignition manager
Internal LMU error, check process sensor, replace LMU.
92
Hardware error in electronics
Internal LMU error, check process sensor, replace LMU, notify
service
95
Invalid time
Correct time
100
Conflict between time/day masters
System error, check clock master of RVA controller or QQA73
110
STB open, excessive temperature
No dissipation of heat, cool off device and perform reset.
Check hydraulics, connections or exchange sensor. Check
terminals 1 & 2 for open circuit
113
Flue gas temperature too high
Check connections, exchange
130
Flue gas limit temperature exceeded
Check connections, exchange
132
External safety interlock activated
Monitoring of external processes in open circuit
133
LMU automated ignition locked (no recognition of
flame after safety period)
Perform reset, if error occurs repeatedly, check gas pressure,
check polarity of power lines, ignition system and ionisation
monitoring
134
Flame failure during operation
Perform reset
135
Air supply error
Rpm threshold of fan exceeded or short of standard, check
parameters and for defective fan.
140
Non-permitted LPB segment number or device
number
Configuration error, check setting of RVA controller OCI460
clip in module.
148
Incompatible LPB interface / basic device
Configuration error, check setting of RVA controllers
151
Internal error in LMU
Check LMU parameters, unlock LMU, replace LMU.
152
Error in LMU parameterisation
Check LMU parameters, perform new LMU parameterisation
153
Ultramax PB is locked
Reset button pressed when boiler is not in fault condition.
154
Operating error detected
Check LMU parameters
160
Fan Rpm threshold not achieved
Blower defective of rpm threshold improperly set.
161
Fan maximum rpm exceeded
Max. fan rpm exceeded, check parameters
180
Chimney sweep function
Display only, no turn-off
181
Control valve stop function active
Display only, no turn-off
183
Ultramax PB is in programming mode
Display only, no turn-off
LED error display is permanently on if LMU error message cannot be changed.
In addition, the display of the diagnostics code flashes.
Pushing the reset button for more than 2 seconds voids the error message.
1) Turn off and lock unlock via restart only.
2) Turn off, prevent restart restart after error correction only.
Should a fault code appear which cannot be reset, or a fault code repeatedly occurs, contact MHS
Boilers for assistance. Do not continue to operate or use the boiler as this may cause damage to the
controls
42


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  • What is the fault code 153 on ultramax pb 120 boiler Submitted on 10-12-2021 at 10:53

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