Gasmaster R Series, Installation Manual, Page: 78 / 81

Part 14 - Troubleshooting
Code Possible cause Solution
01 Supply and return switched at installation Check CH connections
02 CH set point adjusted too low Check parameter 0
03 Max CH modulation set too low Check parameter 1
04 Max modulation time too long Check parameter 2
05 Pump speed too low Check speed in diagnose menu (24) and check parameter 4 and 5
06 Boiler is not able to distribute generated heat Check installation for sufficient flow
07 Outdoor sensor used Check heating curve parameters 7,8,9,10
08 Air in CH circuit Vent the CH circuit
09 Calibration not completed correctly Perform calibration
10 Distance / gap electrode not correct Check electrode gap and distance to burner
11 Ignition electrode damaged Replace ignition electrode
12 Room thermostat connected incorrectly Check cabling and connection to room thermostat
13 Opentherm thermostat connected Set point thermostat (CH temperature) is lower than actual CH temperature. Check item 4 and 5 in
diagnose menu.
14 Thermostat does not switch off Replace thermostat
15 Opentherm thermostat connected Set point thermostat (CH temperature) is higher than actual CH temperature. Check item 4 and 5 in
diagnose menu.
16 Main heat exchanger cluttered Clean heat exchanger
17 CH pressure too low Re-fill installation
18 3-way valve cluttered Check and clean 3-way valve when required
19 3-way valve does not change position Check valve actuator and cables. Replace when required
20 Readout flow sensor incorrect Check flow sensor in diagnose menu (07)
21 Solar tank used to feed boiler Check availability and setting mixing valve
22 Setting DHW set point too high Check parameter 12
23 DHW sensor damaged Check DHW temperature via diagnose menu (8) and replace sensor when required
24 Too high DHW flow over boiler Check use of correct (and undamaged) flow restrictor
25 Plate heat exchanger cluttered at CH side Check plate heat exchanger
26 Gas valve closed Open gas valve
27 No gas supply Gas pressure regulator stuck or broken, gas valve closed, check grid pressure
28 Ignition cable broken or not connected Check ignition cable
29 Ignition cable cap damaged Check for cracks. Replace when required
30 Ignition transformer damaged Check if the unit sparks and check the distance and gap of the electrode. If all OK replace burner
controller.
31 Water in ionisation circuit Check for water (humidity), dry and check operation. Replace when required
32 Dirt in gas valve Check if valve fully closes when power is unplugged
33 Flue gas sensor damaged Exchange sensor and check parameter 14
34 Wrong setting of temperature limit configuration Check parameter 14
35 Maximum power too high Check boiler power and adjust parameter 1 when required
39 Pump does not run is stuck Replace pump or try to turn pump shaft.
40 Refill valve is open Close refill valve
41 Cable damaged Check cables for damage and friction free routing
42 Sensors switched Check sensor positions and connections
43 Supple sensor broken Check sensor in diagnose menu (4) and replace when required
44 Siphon cluttered (condensate cup) Clean siphon
45 Too high circulation losses or demand Boiler is not able to heat tank to a temperature above 70C within 3 hours. Check recirculation losses and
heat exchanger tank
46 Gas valve cables damaged Check cables and replace when required.
47 Gas valve broken Check gas valve and replace when required.
48 Leakage in CH circuit Exchange leaking installation part s and refill
49 CH pressure too high Decrease pressure using the drain valve
50 Expansion vessel broken Check expansion vessel
51 No temperature rise detected within 1 minute Check position of supply sensor and flue gas sensor. Check sensor readings via diagnose menu and
after ignition or sensor broken replace sensor(s) when required
52 No outdoor sensor connected Check parameter 7
53 Outdoor sensor broken Check reading via diagnose menu (11) and replace sensor when required
54 CH return sensor broken Check reading via diagnose menu (6) and replace sensor when required
55 Supply voltage too low Check supply voltage in standby and operation
56 Supply cable damaged Replace supply cable
57 Fan not connected Check fan connection to burner control
58 Too much dust/dirt in fan Check and clean fan
59 Fan broken Replace fan
60 Water on fan connection Check fan and connection and make dry when required
61 CH pressure sensor broken Check reading via diagnose menu (3) and replace when required
62 DHW sensor broken Check reading via diagnose menu (7) and replace when required
63 Incorrect connection to earth Check earth in supply cable and supply cable connections
64 No tank nor tank sensor present Check parameter 11
65 Tank sensor broken Check reading via diagnose menu (12) and replace when required
66 No code key or faulty connection Install code key and or check connections
67 Code key broken Replace code key
68 Boiler cannot distribute heat due to high system Perform calibration with DHW demand to be able to distribute generated heat
temperatures
69 Calibration not successfully completed Perform calibration and check diagnose menu (32)
70 Blocked flue Check flue pipe for blockages
71 Change in flue system after calibration Perform calibration
72 Magnetite filter cluttered Check and clean filter
73 CH return restrainer cluttered Clean hydro block CH return connection
74 Resistance in gas supply pipe too high Check pressure drop over gas supply system too boiler. Contact grid owner when required
75 CH pressure sensor broken Replace sensor. When required sensor can be deactivated temporarily. Parameter 20.
76 Gas / air mixture incorrect Check fan air intake for cracks and secure placement of the air intake sticker.
77 Burner control broken Replace
78 Fan calibration time is running Fan calibration has not completed during calibration process. Wait 10 minutes to finalize calibration.
Table 14.3 Possible causes and solutions
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