Grundig GHP-MM08, Service Manual

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Heat Pump Monobloc Inverter / User Manual
61 Heat Pump Space Heater 202202
4.4.19 Inverter module troubleshooting for single-phase models
4.4.19.1 Codes
The codes displayed on the user interface are below: E15, E16, E17, E18, E19, E20, E21, E22,
E23, E24, E25, E26, E27, E28, E29, E30, E31, E32, E33, E34, E35, E36, E37, and E38. Refer to Table
4-19.1 for these codes.
Table 4-19.1Table of codes
Error code
Content D1(RED)
2
D2(GREEN)
2
D3(YELLOW)
2
E15 Too low DC bus voltage OFF ON ON
E16
Too high DC bus voltage Flash ON ON
E17
Too high AC input peak current OFF Flash ON
E18
Abnormal IPM module ON Flash OFF
E19
Abnormal PFC module OFF ON Flash
E20 Compressor startup failure ON ON Flash
E21
Compressor phase loss error ON Flash ON
E22 1
Inverter module reset
/ / /
E23
Too high compressor current
protection Flash Flash Flash
E24 Too high PFC module temp. protection Flash ON Flash
E25 The current detection circuit failure ON ON OFF
E26 Out of step protection ON ON ON
E27
PFC module temp. sensor error Flash ON OFF
E28
Communication data error between
refrigerant system PCB and inverter
PCB Flash Flash OFF
E29
Too high IPM module temp ON Flash Flash
E30 IPM module temp. sensor error ON OFF Flash
E32 1 Inverter module debugging data / / /
E33 1 Inverter module debugging data / / /
E34
Abnormal AC input power supply Flash OFF ON
E35 1 Inverter module debugging data / / /
E37 1 Module current limiting frequency / / /
E38 1 Module voltage limiting frequency / / /
Note:
1. E22
、
E32
、
E33
、
E35
、
E37 and E38 are not errors and heat pump does not shut down. The
other codes are all errors, heat pump will shut down.
2. The combination of the show states of 3 led lights corresponds to different error codes. In
standby: D1-OFF, D2-Flash and D3-OFF; In normal operation: D1- Flash, D2- OFF and D3-OFF.
Refer to Figure 4-19.1and Figure 4-19.2 for the location of each led.